News

Workshop on Pseudoholomorphic Curves in Hamiltonian Dynamics

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We are happy to announce the workshop “Pseudoholomorphic Curves in Hamiltonian Dynamics” taking place from February 27th to March 3rd, 2023 at the Mathematical Institute Heidelberg. The workshop is aimed at graduate students that are interested in the topic. The first three days we will work in small groups on some foundations of the field. On Thursday we will again in small groups look at some more recent papers (or advanced topics) and have a conference dinner in the evening. Finally, on Friday we shall have a small conference. Every participant will play an active role in the seminar - either by preparing a talk in the first part of the workshop or by presenting their favourite paper on pseudoholomorphic curves in Hamiltonian dynamics. The registration is open until February 03, 2023.

Weblinks:

ERC Consolidator Grant for Annalisa Pillepich

Annalisa Pillepich – Group Leader in the Galaxies & Cosmology Department, MPIA, STRUCTURES CP1

The European Research Council (ERC) has awarded Annalisa Pillepich, research group leader at Max Planck Institute for Astronomy (MPIA), one of the prestigious ERC Consolidator Grants. In her project COSMIC-KEY, Pillepich and her colleagues will be developing the next generation of simulations of galaxies and of the universe as a whole – a key to understanding obser­vational data that is set to become available over the next years.

The objective of COSMIC-KEY is to create the most realistic suites of simu­lations yet of galaxy formation and its consequences for cosmic evolution and cosmic structures. This includes, among many other physical phenomena, the influence of the central black holes not only on the rate of star formation in galaxies but, crucially, on the physical properties of the gas that surrounds galaxies and permeates dark-matter halos. The ultimate goal is to use such numerical and theoretical models to fit data of the X-ray and Sunyaev–Zel'dovich signatures of groups and clusters of galaxies and in turn to infer fundamental cosmological parameters that describe the functioning of the Universe.

With a total amount of 2 million euros, the consolidator grant will be used to finance 4 post-doctoral positions and 2 PhD students at MPIA over the coming five years.

Weblinks:

Research: Simulations of planetesimal formation reproduce key properties of asteroids, comets

With simulations that resolve finer details than ever before, scientists Brooke Polak (Heidelberg University) and STRUCTURES member Hubert Klahr (MPIA, Heidelberg University) have modelled a key phase in the formation of planets in our solar system: the way that centimetre-size pebbles aggregate into so-called planetesimals tens to hundreds kilometres in size. The simulation reproduces the initial size distribution of planetesimals that can be checked against observations of present-day asteroids. It also predicts the prevalence of close binary planetesimals in our solar system.

Planet formation around a star proceeds in several stages. Initially, cosmic dust in the swirling protoplanetary disk around a new star clumps together due to electrostatic (van der Waals) forces, forming so-called pebbles a few centimetres in size. The pebbles in turn join together to form planetesimals: space rocks between tens and hundreds of kilometres in diameter. Finally, collisions among these planetesimals form even larger, gravitationally-bound, solid cosmic objects: planetary embryos, which can continue accreting planetesimals and pebbles until they become planets. Simulating this progression from centimetre-size pebbles to planetesimals, however, is challenging due to the disparate scales involved. The simulations by Polak and Klahr follow an innovative approach by using a kinetic description in which small groups of pebbles in a collapsing cloud in a protoplanetary disk are treated like a gas that can undergo certain phase transitions, and assigning a pressure to this “pebble gas.” In their new work, Polak and Klahr look at several versions of collapsing protoplanetary disk regions, each with at a different distance from the Sun, starting with a distance as close as Mercury's orbit and ending with a collapsing region as far away as Neptune.

Weblinks:

Scientific Computing Seminar by Nick Trefethen on Applications of AAA Rational Approximation

In this week's IWR Scientific Computing Seminar on Friday, January 27, Nick Trefethen (University of Oxford) will give a talk at 15:15h in the Conference Room on the fifth floor of Mathematikon:

Title: Applications of AAA Rational Approximation
Abstract: For the first time, a method has recently become available for fast computation of near-best rational approximations on arbitrary sets in the real line or complex plane: the AAA algorithm (Nakatsukasa-Sete-T. 2018). We will present the algorithm and then demonstrate a number of applications, including detection of singularities, model order reduction, analytic continuation, interpolation of equispaced data, smooth extension of multivariate real functions, extrapolation of ODE and PDE solutions into the complex plane, solution of Laplace problems, conformal mapping and Wiener-Hopf factorization.
(joint work with Stefano Costa and others)
Time & place: Friday January 27, 15:15h, Mathematikon, 5th floor, Conference Room

SIMPLAIX Workshop: “Machine Learning for Multiscale Molecular Modeling”

The first SIMPLAIX Workshop on “Machine Learning for Multiscale Molecular Modeling” will take place in the Studio Villa Bosch in Heidelberg on May 2-4 May, 2023. Please register to participate and to submit abstracts for contributed talks and posters by March 15 at the workshop's webpage. The workshop is organised by Rebecca Wade (HITS), Andreas Dreuw (IWR), Frauke Gräter (HITS), Fred Hamprecht (IWR), Ganna (Anya) Gryn’ova (HITS), Marcus Elstner (KIT), Pascal Friederich (KIT), Ullrich Köthe (IWR).

SIMPLAIX is a newly established cooperation between the Heidelberg Institute for Theoretical Studies (HITS), the Karlsruhe Institute of Technology (KIT) and Heidelberg University, focused on bridging scales from molecules to molecular materials by multiscale simulation and machine learning. The aim of the workshop is to bring together scientists working in the field to share their research and discuss current challenges.

More information:
SIMPLAIX Workshop 2023 - Heidelberg Institute for Theoretical Studies (HITS)

“Marsilius im Gespräch”: Artificial Intelligence – Between Wishful Thinking and Science

In the new podcast episode of Marsilius im Gespräch, the Podcast of Heidelberg's Marsilius Kolleg, Friederike Nüssel talks to Andreas Dreuw (Chemistry), Robert Scheichl (Mathematics, STRUCTURES Cluster) and Jan Schuhr (Law) about chances, limitations and risks of Artificial Intelligence (AI). During their time as Marsilius Fellows, the three scientists have been working on an interdisciplinary project Künstliche Intelligenz: Zwischen Wunderglaube und Wissenschaft.

The Marsilius Kolleg at Heidelberg University bridges the gap between sciences and humanities through meetings and joint projects, which in turn promotes understanding and cooperation between the sciences and the humanities. Founded in 2007, the Marsilius Kolleg is a central component of Heidelberg’s successful proposal granted by the Excellence Initiative, launched by the federal and state governments of Germany.

Weblinks:

“I AM A.I.” – Scientific Exhibition on Artificial Intelligence – Open Until Jan 29, 2023

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A.I. or Artificial Intelligence – a technology that increasingly finds its way into our everyday lives. On one hand, it can make life easier in certain areas and complement human abilities, but A.I. can also cross boundaries. I AM A.I. – Artificial Intelligence Explained addresses questions surrounding A.I. and the novel traveling exhibition opened to the public for the first time ever in the Mathematics Informatics Station (MAINS) of the Heidelberg Laureate Forum Foundation. A wide array of interactive exhibits enable visitors to look at Artificial Intelligence from different angles and learn more about both its possibilities and limitations. Exciting experiments, videos and images show the mathematical methods behind the technology that vividly convey how A.I. works and where it is applied. Guided tours of the MAINS take place every Sunday at 2, 3 and 4 p.m. (in small groups). Registration is not required.

I AM A.I. was developed and implemented by IMAGINARY with funding from the Carl Zeiss Foundation and support by the Klaus Tschira Stiftung.

More information can be found at the MAINS' exhibition website.

Scientific Machine Learning: Kickoff on Jan 19, 2023

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We are delighted to announce the launch of a new recurring series of talks and events on Scientific Machine Learning. The series kicks off on Thursday, January 19th 2023 from 16h30 to 18h00 at Mathematikon (INF 205, Conference Room, 5th floor). Machine Learning galore will feature lab presentations by PIs as well as scientific talks by junior scientists:

Machine Learning galore! - Programme:
  • Lab presentations:
    • Tilman Plehn, Rebecca Wade, Bernhard Höfle, Jakob Zech
  • Science talks:
    • Stefan Radev (Köthe lab): Modeling Uncertainty with Neural Networks
    • Theo Heimel (Plehn lab): Normalizing Flows for LHC Physics
    • Annika Reinke (Maier-Hein lab): Pitfalls and recommendations for image analysis validation
To help plan the catering, please register for free by clicking here.

Scientific Machine Learning is a joint initiative from STRUCTURES and IWR aimed at fostering interactions within and development of the local machine learning community. Its portal, http://mlai.uni-heidelberg.de summarises the many relevant events and news from across campus that would otherwise remain scattered across single institutions or fields.

The goals of this new platform align with the STRUCTURES Cluster of Excellence's objective of driving research into the fundamental understanding of current and future machine learning, and with IWR’s aim to leverage machine learning to enable the solution of long-standing problems in the natural and life sciences, the engineering sciences, as well as the humanities.

Further information and links:

Bad Honnef Physics School on “Physics of Viruses” Sep 2023: Register Now

Viruses have always fascinated physicists due to their apparent simplicity: a small genome protected by a shell of proteins and sometimes by an additional layer of lipids, highly optimised in reagrd to assembly, mechanical stability and information storage. This year's Bad Honnef Summer school, which will take place from September 10 - 15, 2023 at Physikzentrum Bad Honnef, Germany will provide a comprehensive view on biological viruses from the viewpoint of physics, bridging all the scales in from biomolecular structure through infection of single cells to virus spread in populations. The summer school is organised by Sarah Köster (Göttingen) and Ulrich Schwarz (STRUCTURES, Heidelberg) and targeted to advanced physics students, but also open to PhDs and Postdocs.

More information can be found at www.pbh.de.

Seminar by Pierre Haas on Cutting Through the Mechanics of Cell Sheet Folding, EMBL HD, Jan 20

On Friday, January 20 at 2 pm (CET), Pierre Haas from Dresden will be giving a talk on Cutting Through the Mechanics of Cell Sheet Folding as part of the Next Generation Seminar Series of Theory@EMBL at EMBL in Heidelberg:

Title: Cutting Through the Mechanics of Cell Sheet Folding
Abstract: The folding of cellular monolayers is a crucial step of multicellular development, including gastrulation, neurulation, and organogenesis, and is often driven by localised "large bending deformations" of apical constriction and cell wedging. The simplest process in which to study its mechanics is perhaps the inversion of the green alga Volvox, the spherical embryos of which turn themselves inside out through a programme of cell shape changes. In the first part of my talk, I will show how a theoretical model in which apical constriction and cell wedging appear as variations of the intrinsic curvatures of an elastic shell reproduces Volvox inversion quantitatively. I will highlight the novel mechanics resulting from these large bending deformations. In the second part of my talk, I will present recent laser ablation experiments revealing additional geometric incompatibilities between the local intrinsic curvature of the cell sheet and its global shape. I will discuss the mechanics of the resulting residual torques in the cell sheet and show how even small incompatibilities of this kind affect tissue folding. This suggests a more global picture of the mechanics of tissue folding, which does not therefore rely on localised apical constriction and cell wedging only, but also on other, more subtle cell shape changes in other parts of the tissue.
Time & place: Friday, January 20th 2023, EMBL Large Operon and via Zoom
Host: Virginie Uhlmann

If you would like to meet with the speaker (individually or in small groups), please sign up for a slot here (contact: Lizette Michele De Paula, EMBL.)
The STRUCTURES Project Management Office is happy to answer questions.

HeiUP Releases Four New Books in Lecture Notes Physics by Björn Malte Schäfer

We are pleased to announce the release of four new books in Heidelberg University Publishing's (HeiUP) Lecture Notes Physik series, written by Björn Malte Schäfer, Professor of Fundamental Physics at the Center for Astronomy Heidelberg (ZAH). The four books, titled:

provide comprehensive overviews of key topics in theoretical physics, modern cosmology, relativity and statistics. The books are also available online at the webpage of HeiUP Lecture Notes Physik.

STRUCTURES Newsletter Dec 2022

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We are happy to present the ninth volume of the STRUCTURES Newsletter with the following topics:

  1. Recap 2022 and Happy Holidays
  2. Symmetric Spaces for Machine Learning – Representation Matters! (Project Report by Diaaeldin Taha)
  3. STRUCTURES Asks: Lavinia Heisenberg
  4. We Are STRUCTURES

The STRUCTURES Project Management Office is happy to answer questions and to receive feedback.

  Research: STRUCTURES Scientists simulate curved and expanding spacetime using ultracold atoms

For the first time, cosmological expansion and curved spacetimes have been simulated in the lab using ultracold atoms.

In a laboratory experiment, a team of STRUCTURES researchers from CP 4 at Kirchhoff-Institute for Physics (KIP) and Institute for Theoretical Physics (ITP) have succeeded in realising an effective spacetime that is experimentally controllable. In their research with ultracold quantum gases of potassium, they were able to simulate an entire family of curved universes to investigate different cosmological scenarios and compare them with the predictions of a quantum field theoretical model. “For the wave-like excitations on the condensate, the propagation speed depends on the density and the interaction of the atoms. This gives us the opportunity to create conditions like those in an expanding, spatially curved universe,” explains Prof. Dr Stefan Flörchinger. The researcher, who previously worked at Heidelberg University and joined the University of Jena at the beginning of this year, elaborated the theoretical mapping of the atomic system to a noninteracting quantum field in a curved and expanding metric, which was used to benchmark the experimental results.

The success of this experiment shows that quantum field simulators offer the possibility to enter unexplored regimes in quantum cosmology. “Studying the interplay of curved spacetime and quantum mechanical states in the lab will keep us busy for some time to come,” says Prof. Dr Markus Oberthaler, head of the experimental group and STRUCTURES speaker.

Further reading and information:

Seminar by George Bougas on Dynamical Association of Efimov Trimers and Atom-Dimers in Cold Gases, Nov 30

On Wednesday, November 30, 2 pm (s.t.) there will be a talk by George Bougas (Hamburg University) on:

Title: Dynamical Association of Efimov Trimers and Atom-Dimers in Cold Gases
Abstract: Properties of Efimov states, that is three-body bound states, are typically measured indirectly through recombination mechanisms, which are ubiquitous in cold gases. Here, a dynamical protocol is investigated allowing for a more controlled probing of these states. In particular, pulses of the scattering length are employed to create a superposition of Efimov trimers and atom-dimers in cold gases, similar to Ramsey spectroscopy. This scheme allows the observation of both the energies and lifetimes of Efimov states, by measuring the remaining fraction of atoms during the free evolution time between the pulses. It is predicted that the mixing of states provided by the second pulse will lead to a measurement of twice the intrinsic lifetime of the Efimov states.
Venue: Philosophenweg 12, kHS (small lecture hall) and online via Zoom.

The talk will be hosted by Prof. Richard Schmidt (ITP). The STRUCTURES Project Management Office is happy to answer questions.

Seminar by Christina Kurzthaler: Physics of Bacterial Transport in Dilute & Porous Environments, EMBL, Nov 29

On Tuesday, November 29, 10:00 am there will be a special seminar by Dr. Christina Kurzthaler – group leader at the Max Planck Institute for the Physics of Complex Systems – in person at the European Molecular Biology Laboratory (EMBL) and on Zoom:

Title: The physics of Bacterial Transport in Dilute and Porous Environments
Abstract: Unraveling the motion of microorganisms in dilute and porous media is important for our understanding of both the molecular basis of their swim gait and their survival strategies in microbial habitats. First, I will show that by using renewal processes to analyze experimental measurements of wild-type E. Coli, we can provide a quantitative spatiotemporal characterization of their run-and-tumble dynamics in bulk. We further demonstrate quantitatively how the persistence length of an engineered strain can be controlled by a chemical inducer and characterize a transition from perpetual tumbling to smooth swimming. Second, I will address how this run-and-tumble gait evolves towards a hop-and-trap motility pattern of agents moving in a porous environment [1]. Using computer simulations, we discover a geometric criterion for their optimal spreading, which emerges when their persistence lengths are comparable to the longest straight path available in the porous medium. Our criterion provides a fundamental principle for optimal transport in densely-packed biological and environmental settings, which could be tested experimentally by using engineered cells and may provide insights into microbial adaption mechanisms. [1] C. Kurzthaler et al. Nat. Commun. 12, 7088 (2021)
Venue: Large Operon & online via Zoom

The STRUCTURES Project Management Office is happy to answer questions.

Film Screening of “Arrival” with Scientific Introduction as part of the Ruperto Carola Lecture Series

In the context of this winter semester's Ruperto Carola Lecture Series “Vom Ende als Anfang” (in German), Heidelberg University will be screening the science fiction movie “Arrival” with a scientific introduction by STRUCTURES member Prof. Dr. Matthias Bartelmann, astrophysicist at the Institute of Theoretical Physics (ITP). Against the backdrop of the climate crisis, war, pandemics and a radically changing world order, speakers from different perspectives will address the highly topical question of the tension between end and beginning. To what extent do catastrophes and crises not only pose a threat, but can also be the beginning of radical metamorphoses and new world models? The movie “Arrival” by Canadian director Denis Villeneuve addresses the difficulty of communication in the context of spreading fears and paranoia fuelled by the arrival of an extraterrestrial civilisation on Earth. The film screening will take place on November 28, 2022 at Karlstorkino, Marlene-Dietrich-Platz 3, and will start at 7.30 pm.

For more information, see the University press release (German only).

EINC Research Building is being officially inaugurated

Heidelberg scientists will develop novel computing technologies at the European Institute for Neuromorphic Computing (EINC)

The new EINC building at Heidelberg University – an experimental hub for pioneering research on new computing technologies – is about to be officially inaugurated. The ceremony on 23 November 2022 will be hosted by the Mannheim and Heidelberg office of the state assets and construction company Vermögen und Bau Baden-Württemberg. Attending the event will be the state's Minister of Science and the Finance Minister, along with representatives of three donors who have secured the implementation of this innovative project with their financial support. The EINC will provide research and work areas for scientists from the Faculty of Physics and Astronomy, the STRUCTURES Cluster of Excellence and the new Faculty of Engineering Sciences, who are engaged in developing and establishing novel computer technologies and designs based on fundamental principles of physics. In cooperation between various disciplines, new hardware models are emerging with different technology platforms relying on high-end analogue electronics, modern integrated optics and highly controlled quantum systems.

New Podcast Episode: Exzellent Erklärt - Spitzenforschung für alle

A new podcast episode of “#exzellenterklaert - Spitzenforschung für alle” is online. The new episode deals with the subject “The Ocean Floor: Unexplored Interface of the Earth”. The ocean floor is a unique ecosystem. However, as of yet, only a small portion of it has been scientifically investigated. The difficulties related to accessibility necessitate ship expeditions and the use of highly specialised underwater equipment for its exploration. The Cluster of Excellence “The Ocean Floor – Earth’s Uncharted Interface” aims to initiate a new chapter in this field of research by quantifying exchange processes at this significant boundary layer and their roles in the Earth's ecosystem.

The German science podcast “Exzellent Erklärt - Spitzenforschung für alle” reflects the research diversity of Germany’s leading research institutions and Clusters of Excellence: from Antiquities to Quantum Physics. In each episode, listeners can expect insights into the interdisciplinary work of one research network.

Link: https://exzellent-erklaert.podigee.io/.

Anna Wienhard becomes director of MPI for Mathematics in the Sciences

Anna Wienhard, one of our speakers, has accepted an offer by the Max Planck society. As of November 1st, 2022, she is director at the Max Planck Institute for Mathematics in the Sciences, Leipzig. She will keep close ties with Heidelberg's research community and the Cluster of Excellence STRUCTURES. Congratulations, Anna, for obtaining this very prestigious position and all our best wishes for your work there! And thank you for all the great contributions you have made to our cluster!

New Podcast Episode: Exzellent Erklärt - Spitzenforschung für alle

A new podcast episode of “#exzellenterklaert - Spitzenforschung für alle” is online. The new episode deals with the subject “Dark matter: Searching for the missing particles”. Dark matter is a substance that does not emit or interact with light. Its existence is inferred from a multitude of astronomical observations suggesting dark matter is present in huge amounts throughout the cosmos. So far, however, dark matter has not been detected directly, and its precise nature is unknown. The “Quantum Universe” Cluster of Excellence uses various approaches in order to help solve the mystery of dark matter. The episode features particle physicist Prof Erika Garutti and theoretical astrophysicist Prof Marcus Brüggen.

The German science podcast “Exzellent Erklärt - Spitzenforschung für alle” reflects the research diversity of Germany’s leading research institutions and Clusters of Excellence: from Antiquities to Quantum Physics. In each episode, listeners can expect insights into the interdisciplinary work of one research network.

Link: https://exzellent-erklaert.podigee.io/.

STRUCTURES Newsletter Oct 2022

Click the image to open the Newsletter as PDF.

We are happy to present the eighth volume of the STRUCTURES Newsletter featuring the following topics:

  1. STRUCTURES Short News Oct 2022:
    • Dual Superfluidity Observed in Ferromagnetic Ultracold Gas
    • STRUCTURES Blog and Social Media
  2. Research Update: Machine learning meets quantum simulation
  3. 6th YRC Schöntal Workshop on “Renormalisation and Effective Theories”
  4. New Members and Fellows
  5. We Are STRUCTURES
  6. STRUCTURES Asks: Felix Joos

The STRUCTURES Project Management Office is happy to answer questions and to receive feedback.

  ERC Synergy Grants for STRUCTURES members Anna Marciniak-Czochra and Simon Anders

The ERC Synergy Grants are awarded for collaborative research by the European Research Council.

The European Research Council awards Prof Anna Marciniak-Czochra (IAM/BioQuant/IWR) and Jun-Prof Simon Anders (Bioquant/ZMBH) together with Dr Laure Bally-Cuif (Institut Pasteur, Paris) and Ana Martin-Villalba (DKFZ) the highly endowed ERC Synergy grant for a pioneering research project that focuses on interdisciplinary research into the dynamics and control of neural stem cells. Stem cells are human cells with the unique ability to develop various other types of cells with specialised functions. The project “PerPetuating Stemness: From single-cell analysis to mechanistic spatio-temporal models of neural stem cell dynamics” (PEPS) is going to investigate the ability of stem cells to renew themselves and to differentiate. The PEPS team will develop and combine experimental methods with data analysis and mathematical modelling in order to understand how neural stem cells guarantee the human brain's long-term function by constantly generating new neurons necessary for its plasticity and repair. This requires an interdisciplinary and multi-scale effort to clarify how to reconcile decisions taken at the single cell level and at the population level. The ERC is making available approximately eleven million euros for the PEPS project, with almost 3.8 million going to fund the work at Ruperto Carola. The ERC Synergy Grants fund collaborative projects that, due to their complexity, require methods and expertise of multiple groups in order to achieve breakthroughs that would not be possible in individual projects.

Further information:
Anna Marciniak-Czochra's Website
Simon Anders' Website
Press Release by the European Research Council

Special Seminar on Physical Mathematics by Vasily Golyshev, Fri Oct 28, 2022

Click the image to open the poster as PDF.

On Friday, October 28, 11:15 am, there will be a special Physical Mathematics seminar by Vasily Golyshev (Bures-sur-Yvette) on Hypergeometric Calabi-Yau Motives and their Birch-Swinnerton-Dyer Volumes:

Abstract: We give closed hypergeometric expressions for the Birch–Swinnerton-Dyer volumes of certain rank $4$ weight $3$ Calabi–Yau motives presumed to be of analytic rank $1$. We compare the first derivative of the $L$–functions of these motives at the central argument $s = 2$ to the B-SD volumes.

The talk will take place in Mathematikon, SR 9 at 11h (c.t.).

  Research: Dual superfluidity observed in a ferromagnetic ultracold gas

STRUCTURES scientists have experimentally demonstrated twofold superfluidity and dynamical thermalization in an ultracold ferromagnetic spinor Bose gas of Rubidium atoms.

Homogeneous spinor Bose gas and easy-plane ferromagnetic properties. Reproduced from Prüfer, M., Spitz, D., Lannig, S. et al. (2022), Nature Physics, Fig. 1. For details about panels (a) to (e), please refer to the caption in this publication.

Bose-Einstein condensates form an ideal ground to explore dynamical phenomena emerging in the many-body limit. Due to their rich internal structure spinor condensates give rise to intricate symmetry breaking and superfluidity features. Superfluids can flow without dissipation and are an example of a macroscopic system dominated by quantum physics. The equilibrium state of the spin-1 gas at ultralow temperatures exhibits a dual condensate in the “easy-plane” ferromagnetic phase. This is a form of matter in which all atoms show phase coherence over the whole extent of the system in both density and spin. The direct observation of this dual state has previously been challenging due to access to only short timescales or limited experimental control. In a recent experiment carried out by the group of Markus Oberthaler at the Kirchhoff Institute for Physics (KIP) in collaboration with Daniel Spitz and Jürgen Berges from the Institute of Theoretical Physics (ITP) it has been prepared and thoroughly probed for the first time. The quantum gas could be stored long enough to observe the system’s evolution towards its equilibrium state, as well as to demonstrate the emergence of long-range coherence and spin-superfluidity. The new methods and results are an important step towards understanding quantum many-body dynamics and thermalization in large magnetic spin systems.

Link to the associated publication in Nature Physics:
Prüfer, M., Spitz, D., Lannig, S. et al. Condensation and thermalization of an easy-plane ferromagnet in a spinor Bose gas. Nat. Phys. (2022). https://doi.org/10.1038/s41567-022-01779-6.

  Research: Machine learning meets quantum simulation

Artistic view of a neural network interacting with a quantum spin system. This image was generated by the artificial intelligence DallE2.

Summary by Tobias Schmale, Moritz Reh and Martin Gärttner:
Quantum simulators solve quantum many-body problems that are hard to simulate on classical computers due to the exponential increase of computational cost with the number of simulated particles. This exponential hardness also hits when performing quantum tomography, which means fully characterizing the prepared quantum states. Machine learning inspired variational approaches may overcome this challenge by restricting the manifold of trial states among which the experimentally prepared state is searched. The trick is to find structures inherent to the physical problem the simulator tries to solve, and to use these to create a compressed state representation, just like e.g. in image compression methods. In [1] we demonstrated that this method leads to a scalable tomography scheme using convolutional neural networks. We considered various experimentally relevant scenarios where we generated synthetic measurement data numerically. Working towards deploying this method on real experimental data, we recently applied it to an experiment creating entangled photon pairs [2]. A unique extension, that was possible thanks to collaborations within STRUCTURES, is the use of neuromorphic hardware. Optimizing the parameters of an analog neuromorphic chip we demonstrated the encoding of Bell states [3] and quantum ground states [4].

Associated literature:

  1. T. Schmale, M. Reh, M. Gärttner. Efficient quantum state tomography with convolutional neural networks. NPJ Quantum Information 8, 115 (2022).
  2. M. Neugebauer, L. Fischer, A. Jäger, S. Czischek, S. Jochim, M. Weidemüller, M. Gärttner. Neural-network quantum state tomography in a two-qubit experiment. Phys. Rev. A 102, 042604 (2020).
  3. S. Czischek, A. Baumbach, S. Billaudelle, B. Cramer, L. Kades, J. M. Pawlowski, M. K. Oberthaler, J. Schemmel, M. A. Petrovici, T. Gasenzer, M. Gärttner. Spiking neuromorphic chip learns entangled quantum states. SciPost Phys. 12, 39 (2022).
  4. R. Klassert, A. Baumbach, M. A. Petrovici, M. Gärttner. Variational learning of quantum ground states on spiking neuromorphic hardware. iScience 25(8), 104707 (2022).

Honorary Doctorate for Theoretical Physicist Sally Dawson, Special Lecture on Oct 13

Sally Dawson (Image source: Heidelberg University)

In recognition of her outstanding scientific achievements in the field of Theoretical Physics, Dr Sally Dawson is to be awarded the honorary doctorate of the Combined Faculty of Mathematics, Engineering and Natural Sciences of Heidelberg University. The Faculty is paying tribute to her contributions, particularly to the discovery and physics of the Higgs Boson. Dr Dawson, researcher at the Brookhaven National Laboratory, has had close connections for many years with the elementary particle research community in Germany, and Heidelberg in particular.

The honorary doctorate will be presented by Rector Prof Dr Bernhard Eitel at an award ceremony on Thursday (Oct 13) at 6 pm in the Great Hall of the Old University (Alte Aula). The laudatory address will be given by STRUCTURES member Prof Dr Jürgen Berges, Dean of Heidelberg's Physics & Astronomy Department. Dr Dawson will then give the “Hans Jensen Lecture” on the topic “Why Study Particle Physics? Tackling the Big Questions”. The lecture series commemorates Hans Jensen, a Heidelberg researcher in the field of Theoretical Physics who received the Nobel Prize in 1963.

For more information, see also Heidelberg University's press release.

  49th Heidelberg Physics Graduate Days Oct 10-14, 2022

The 49th Heidelberg Physics Graduate Days of the Heidelberg Graduate School for Physics (HGSFP) take place on October 10 - 14, 2022. With the Graduate Days, co-organised by STRUCTURES, the HGSFP offers advanced students and researchers a biannual spring/autumn school featuring different topics from various fields of physics. Participants are encouraged to broaden their perspective in physics by attending introductory courses on topics that are unfamiliar to them, or deepen their knowledge by attending specific courses that may be offered at a deeper level. Courses are held in English.

The schedule and further information can be found on the Graduate Days Website.

Young Scientist Retreat FI EMS from Nov 24 to 26, 2022

Click the image to open the poster as PDF.

The Flagship Initiative: Engineering Molecular Systems (FI EMS) invites all PhDs and PostDocs working in the field of Engineering Molecular Systems at Heidelberg University (and its partner institutions) to their young scientist retreat at Trifels on November 24th – 26th 2022. There will be a scientific program with talks and posters as well as some time for social activities. Registration is open until October 10th.

Further information:

Talk by Avi Wigderson (Abel Prize winner 2021) on “Randomness - the Utility of Unpredictability”, September 19, 3:00 pm

Avi Wigderson | Image © Cliff Moore / Institute for Advanced Study, Princeton, NJ USA. Source: IAS Press Center, used with permission.

We are delighted to announce that Prof. Avi Wigderson (IAS, Princeton, Abel prize winner 2021) will give a talk with the title Randomness - the Utility of Unpredictability on Monday, Sep 19, 3 pm at INF 230 (Großer Hörssal). The talk is aimed to a general audience, in particular to staff and students in physics, computer science and mathematics. After the talk, there is some time for questions to and chatting with the speaker.

Title: Randomness - the Utility of Unpredictability
Abstract: Is the universe inherently deterministic or probabilistic? Perhaps more importantly - can we tell the difference between the two? Humanity has pondered the meaning and utility of randomness for millennia. There is a remarkable variety of ways in which we utilize perfect coin tosses to our advantage: in statistics, cryptography, game theory, algorithms, gambling... Indeed, randomness seems indispensable!
Which of these applications survive if the universe had no randomness in it at all? Which of them survive if only poor-quality randomness is available, e.g. that arises from "unpredictable" phenomena like the weather or the stock market? A computational theory of (pseudo)randomness, developed in the past decades, reveals (perhaps counter-intuitively) that very little is lost in such deterministic or weakly random worlds. In the talk I'll explain the main ideas and results of this theory.
No special background will be assumed.
Host: Felix Joos

Avi Wigderson is a widely recognized authority in the diverse and evolving field of theoretical computer science. His main research area is computational complexity theory. Together with László Lovász, Avi Wigderson was awarded the Abel prize 2021 for their striking contributions to Theoretical Computer Science and Discrete Mathematics. The Abel prize is together with the fields medal arguably the most prestigious award in mathematics.
Avi Wigderson visits Heidelberg as he is a speaker at the 9th Heidelberg Laureate Forum

Please see also the talk announcement at the Theoretical Computer Science group page.

YRC STRUCTURES Conference Oct 4-7 2022: Register now

Poster (PDF, 1.2 MB)

The registration for the YRC STRUCTURES Conference 2022 closes soon. You can still register until September 7th via this link.
The YRC STRUCTURES Conference, which takes place from October 4 to 7 in Neuenheimer Feld, will bring together young and senior members of the cluster. It is the first and only such event which allows all cluster and YRC (Young Researchers Convent) members to meet in person and discuss your ongoing research within the cluster. We look forward to engaging overview talks contributed by the cluster PIs, exciting talks by YRC members presenting their research and newest results within the cluster, fruitful discussions during poster sessions and lunch talks from exciting new start-ups.

For further information, please see also the conference web page.

3rd Workshop on Topological Methods in Data Analysis Sep 28 – 30

Poster (PDF, 549 KB)

From 28th to 30th of September the Third Workshop on Topological Methods in Data Analysis will take place within the Cluster of Excellence STRUCTURES at Heidelberg University. This three-day workshop includes introductions into the powerful data analysis machinery of persistent homology and to machine learning techniques. A particular focus is laid on synergies between topological data analysis and machine learning, where fruitful applications have been recently emerging. The workshop will take place primarily online, complemented by on-site get-together opportunities in Heidelberg.
The registration is now OPEN (link).

Prior to the workshop, we offer from 12th to 16th of September, an introductory course on topological data analysis on-site in Heidelberg, which is tailored to non-mathematicians and focusing on intuitive examples. We ask for prior notification of attendence via mail to mschmahl[at]mathi.uni-heidelberg.de.

For further information, please see the workshop's webpage at:
https://tda.mathi.uni-heidelberg.de/

Workshop in Geometry and Dynamics Oct 20-21, 2022

Poster (PDF, 4 MB)

We are happy to announce that registration is open for the Workshop in Geometry and Dynamics, which is going to take place on October 20th and 21st at Mathematikon in Heidelberg. The aim of this workshop is to bring together researchers in geometry and dynamics with a particular focus on magnetic dynamics, billiards, symplectic geometry and sub-Riemannian geometry.

The registration link and more information can be found at:
https://www.sites.google.com/view/workshopgeometryanddynamics/home.

STRUCTURES Blog and Social Media Channels Online

We are delighted to announce that the new STRUCTURES Blog is online, launched in parallel with our new social media presence on Twitter (@structures_hd) and Instagram (@structures_heidelberg). On the blog and on our Instagram and Twitter channel, we will provide explanations and insights on interesting structures that are related to our research in the STRUCTURES cluster, and visualize them with captivating images. We hope to give a broad, interested audience an idea of what these structures are, how they come about, and why they fascinate us. Starting off with an article by Manfred Salmhofer on "The Structure of STRUCTURES", we look forward to your feedback regarding the blog.

Related links:

  New Podcast Episode: Exzellent Erklärt - Spitzenforschung für alle

A new podcast episode of “#exzellenterklaert - Spitzenforschung für alle” is online. In this episode, Bettina Weigelin and Judith Feucht explore the question how we can help our immune system in the fight against cancer with CAR-T cell therapies. The two researchers are working together in the iFIT - Cluster of Excellence to develop new methods to improve cancer immunotherapy. At the heart of the therapy are T-cells, which play a central role in our immune system. These are being modified in Judith Feucht's lab so that they can better fight the cancer cells. Using state-of-the-art microscopes, Bettina Weigelin then studies how well the modified T-cells fight cancer.

The German science podcast “Exzellent Erklärt - Spitzenforschung für alle” on current science topics reflects the research diversity of the Germany’s leading research institutions and Clusters of Excellence: from Antiquities to Quantum Physics. In each episode, listeners can expect insights into the interdisciplinary work of one research network.

Link: https://exzellent-erklaert.podigee.io/.

New Centre for Model-Based Artificial Intelligence (AI)

Prof. Ullrich Koethe | Image © Marsilius Kolleg

The new, interdisciplinary CZS Heidelberg Center for Model-Based AI at Heidelberg University connects mathematical modelling methods with information processing in neuronal networks. To this end it links research activities from the fields of mathematics, computer science, physics, and medicine – part of which are carried out within STRUCTURES and its participating institutes. The centre aims to develop highly effective, energy-efficient, and privacy-compliant information processing and problem-solving processes for research and industry. Of central significance will be the combination of mathematical models and modern machine learning processes. “We are working on methods that are reliable and demonstrate how certain the decisions made with the aid of neuronal networks are,” states Prof. Ullrich Köthe (IWR), who is majorly involved in setting up the new centre. With “green IT” as their motto, the researchers furthermore intend to design their numerical techniques to consume as little energy as possible. The centre is funded by the Carl Zeiss Foundation (CZS) with five million euros over a period of six years.

See also Heidelberg University's Press Release.

Ruperto Carola magazine July 2022: STRUCTURES Members Wolfram Pernice and Rüdiger Klingeler provide insights into their research

In the current issue (July 2022, German) of Heidelberg University's research magazine "Ruperto Carola", STRUCTURES professor Wolfram Pernice provides insights into his research on novel computing platforms that work with light instead of electrons. These so-called "photonic" computing platforms allow to perform operations relevant to neural networks and artificial intelligence (AI) in very short times and with remarkable energy efficiency. This will be of huge relevance for overcoming current barriers to the bandwidth of conventional AI computing systems based on electronic computers. The architecture underlying the programmable nanostructures developed by Prof. Pernice and his group are inspired by the functioning of neurons and the human brain, which do not strictly distinguish between data storage and data processing. Such "neuromorphic" computational methods promise new applications in autonomous driving, training artificial neural networks or ultra-fast processing of telecommunication signals.

In the same issue, Prof. Rüdiger Klingeler of STRUCTURES talks with educational scientist Nina Jude about hard facts in soft research fields, about defects that increase the stability of a material, and about the question of which soft skills and hard skills are really necessary in studies; and what school education should do in this regard.

  Research: First dormant black hole found outside the Milky Way

An international research team under participation of STRUCTURES member Fabian Schneider discovered a “dormant” black hole in a binary-star system outside our galaxy. These black holes are very difficult to find because they do not emit X-ray radiation.

Artist’s impression of VFTS 243 in the Tarantula Nebula. Credit: ESO / L. Calçada.

In their study, published in Nature Astronomy, the researchers reported the first discovery of a ‘dormant’ stellar-mass black hole, VFTS243, outside the Milky Way galaxy, based on observations with ESO's Very Large Telescope (VLT). Stellar-mass black holes form when massive stars collapse under their own gravity at the end of their lives. If this happens in a binary system, the resulting black hole will be orbiting a luminous companion star. Such black holes often accrete material from their companion and emit powerful X-rays, but a “dormant” black hole does not. Astronomers suspect that many more dormant black holes exist than previously thought. The team also found that the star that gave rise to VFTS243 disappeared without evidence of a strong supernova explosion, indicating a ‘direct-collapse’ scenario. The new results have significant implications for the origin of black-hole mergers in the cosmos.

Original Publication (July 18, 2022):
Shenar et al: An X-ray quiet black hole born with a negligible kick in a massive binary within the LMC. Nature Astronomy.

Public lecture by Sebastian Hensel on the Poincaré Conjecture + Open HEGL on July 22

Click the image to open the PDF.

On July 22, Prof. Dr. Sebastian Hensel (LMU Munich) will give a public talk (in German) on “Von Sphären, Schleifen und Flüssen: die Poincaré-Vermutung und die Form des Raums” as part of our event series on the Poincaré conjecture in the context of the nationwide Millennium Prize Problems Mathfest. This talk is aimed at everyone who is curious about topology and at high school students (Oberstufe). After the talk, there will be the opportunity to talk to the lecturer and other scientific experts and to participate in a hands-on exploration of geometry and topology at the Heidelberg Experimental Geometry Lab (HEGL).

For details, please see the event page of the Research Station Geometry & Dynamics and the press release (German).

STRUCTURES Newsletter July 2022

Click the image for a PDF version.

We are happy to present the seventh volume of the STRUCTURES Newsletter, which features the following topics:

  • 1. STRUCTURES Short News July 2022
  • 2. From CP4: Simulating a Quantum Field in Curved and Expanding Spacetimes
  • 3. We Are STRUCTURES
  • 4. STRUCTURES Asks: Björn Malte Schäfer

The STRUCTURES Project Management Office is happy to answer questions and to receive feedback.

Millennium Prize Problems Mathfest: Celebrating the Poincaré Conjecture (July 2022)

Click the image for a PDF version.

In July, we proudly present two talks in Heidelberg on the Poincaré Conjecture, one of the seven famous, complex “Millennium Prize Problems” defined by the Clay Mathematics Institute in 2000. On July 15 and 22, respectively, Prof. Dr. Markus Banagl (Uni Heidelberg) and Prof. Dr. Sebastian Hensel (LMU Munich) will give insights into this intriguing subject and recent developments in the field. After the talk on July 22, there will be the opportunity to talk to the lecturer and other scientific experts and to participate in a hands-on exploration of geometry and topology at the Heidelberg Experimental Geometry Lab (HEGL). These events are part of a nationwide Millennium Prize Problems celebration. The solution to each of these problems carries a prize of 1 million USD. Among them, only the Poincaré conjecture has been fully resolved. Established by Henri Poincaré in 1904 and proved by Grigori Perelman in 2003, it states that every finite three-dimensional space without boundary, on whose surface every loop can be continuously contracted to a point, must have the form of a three-dimensional sphere.

Details on the programme can be found on the event page of the Research Station Geometry & Dynamics.
Please also see the associated press release (German).

Differential Geometry Seminar by Richard Kenyon: “Dimers, webs and SLn local systems” on July 7

We cordially invite you to attend the talk by visiting guest professor Richard Kenyon (Yale) in the Differential Geometry Seminar on July 7, 1:00 - 2:00 PM at the Mathematical Institute in Seminarraum A:

Title: Dimers, webs and SLn local systems
Abstract: We consider SLn-local systems on graphs on surfaces and show how the associated Kasteleyn matrix can be used to compute probabilities of various topological events involving the overlay of n independent dimer covers (or “n-webs”). This is joint work with Dan Douglas and Haolin Shi.

For more information, please visit the seminar web page.

Herlinde Koelbl: “Faszination Wissenschaft - 60 Begegnungen mit wegweisenden Forschern unserer Zeit” on June 30

We are delighted to announce the talk “Faszination Wissenschaft - 60 Begegnungen mit wegweisenden Forschern unserer Zeit” by photographic artist Herlinde Koelbl, which was postponed to 2022 due to the pandemic situation:

Thursday, June 30, 2022, 6 pm (c.t.),
Neue Universität, Hörsaal 13.

The talk will be held in German. The STRUCTURES Project Management Office is happy to answer questions.

  Workshop on “Geometry and Machine Learning” July 11–13 - Register Now

Click on the poster for a larger version.

On behalf of the Research Station: Geometry and Dynamics and the Cluster of Excellence: STRUCTURES, we are happy to announce that the registration for the “Workshop on Geometry and Machine Learning” (July 11–13, HITS) is open. This workshop will bring together researchers and practitioners of Geometry and Machine Learning to interact and exchange ideas.

You can register on: https://gaml.mathi.uni-heidelberg.de/

The deadline for registration is Sunday, June 26th, 2022.

  Research: Bubbly structure of gas in the Milky Way

An international group of astronomers under participation of STRUCTURES member Ralf Klessen found the imprint of the bubbles produced by the explosion of dying stars in the structure of the gas that pervades our galaxy.

Hydrogen emission in the inner part of the Galaxy showing bubbly structure in the interstellar medium. The scientists used artifical intelligence to analyse the radio data. (© J.D. Soler, INAF / Hi4Pi)

An international researcher team under participation of STRUCTURES scientists has found the imprint of bubbles produced by supernova explosions in the structure of the gas that pervades our Galaxy. They made this discovery by applying artificial intelligence (AI) methods to data from the HI4PI survey, the most detailed all-sky map of atomic hydrogen in the Galaxy to date. The scientists analysed filamentary structures in the emission of atomic hydrogen and found that their orientation with respect to the Galactic plane changes progressively with radius, indicating a similar distribution of atomic gas as in nearby spiral galaxies. The study revealed that filamentary structures preserved a record of dynamical processes induced by ancient supernova explosions and the rotation of the Galaxy. The new results are an important step in understanding the process responsible for galaxy-scale star formation.

Original Publication:
J. D. Soler et al., The Galactic dynamics revealed by the filamentary structure in atomic hydrogen emission, arXiv:2205.10426v1 [astro-ph.GA] 20 May 2022. See also the press release of the Center for Astronomy Heidelberg (ZAH).

  SAVE THE DATE: Invitation to the YRC STRUCTURES Conference Oct 4 to 7, 2022

We are happy to announce that the Young Researchers Convent (YRC) STRUCTURES Conference will take place from October 4th-7th 2022 in Heidelberg. The conference intends to bring together young and senior members of the cluster in virtue of closer collaboration. It serves as an opportunity to present and discuss research throughout STRUCTURES such as the CPs and EPs. The conference consists of seven keynotes by PIs in each of the CPs, as well as presentations of current projects from the members (talks and posters) of the YRC.
The registration will open soon, stay tuned!

Links: Conference webpage | YRC page.

  Research: Collective movement of pathogens largely determined by physical principles

STRUCTURES member Ulrich Schwarz examines how physical properties of malaria parasites can influence their individual and collective dynamics, as part of an interdisciplinary research team.

The figure combines the confocal microscopy image of sporozoite vortices with the snapshot of an agent-based computer simulation of these vortices. (© Frischknecht group & Schwarz group, paper in Nature Physics)

The disease of malaria is triggered by single-celled parasites that accumulate in large groups in the salivary glands of mosquitoes before transmission to human beings. In an interdisciplinary study, the research teams led by Prof. Dr Friedrich Frischknecht (malaria research), Prof. Dr Karl Rohr (biomedical image analysis) and Prof. Dr. Ulrich Schwarz (physics of complex biosystems) have set the pathogens in motion and studied their collective dynamics. The researchers discovered that malaria parasites can migrate in large vortices when extracted by means of appropriate experimental preparation. To understand these phenomena the acquired image data were analysed quantitatively using cutting-edge methods of image processing, allowing to precisely identify the parameters that explain the experimental observations. The teams observed emerging properties of collective migration, which arise because the movement of the individual pathogens is converted into elastic energy that is stored in the vortex. “Our new model system offers the opportunity to better understand the physics of collectives with elastic properties and perhaps render them usable for technical applications in the future,” explains Ulrich Schwarz.

Weblinks:
University's press release (English, May 13).
Original publication by Patra et al. (2022) in Nature Physics

Public lecture on Mathematics in Music and Visual Arts (May 30)

We cordially invite you to the public lecture on “Töne sehen und Muster hören – Mathematik in Musik und Kunst” by Prof. Jürgen Richter-Gebert (TU München) on Monday, May 30 2022 at 5 pm, Mathematikon lecture hall.

Abstract: Math makes it possible. This lecture is a journey through central topics of mathematics and art such as symmetry, proportion, and rhythm. Here are some of the questions addressed in the lecture:
  • What do tiles, common salt, and a canon have in common?
  • How can you create one picture by moving shapes?
  • How do you create a 3-D-model out of such a picture? Can you hear it?
You will be able to witness a small set of simple rules turning into fascinating structures. This metamorphosis is performed by a piece of interactive software. The results may vary from intricate images to intriguing drum beats.

Link: Announcement by the Research Station Geometry & Dynamics.

  STRUCTURES Workshop “Random Geometry in Heidelberg” May 16 - 20

From 16th to 20th of May the Workshop “Random Geometry in Heidelberg” is going to take place within the cluster of excellence STRUCTURES at Heidelberg University. The goal of the workshop is to foster interactions between researchers in random geometry, quantum gravity and quantum field theory. To this end it combines a diverse schedule of scientific presentations with ample discussion time. Topics include but are not limited to: tensor field theory, group field theory, the topological recursion and non commutative field theory. Special emphasis will be placed on applications of such models to quantum gravity, conformal field theory, condensed matter or artificial intelligence.

The workshop will take place in the Neuenheimer Feld campus in Heidelberg and is organised by Razvan Gurau, Sabine Harribey, Carlos Perez Sanchez and Adrian Tanasa. Links and further information are available at the workshop’s webpage.

  Research: Observation of Cooper pairs in a mesoscopic two-dimensional Fermi gas

STRUCTURES physicists Philipp Preiß and Selim Jochim have directly observed Cooper pairs in an ultracold Fermi gas.

Fermionic atoms are trapped in the centre of a potential created by superimposing an optical tweezer with a 2D optical dipole trap (Image credit: Holten et al. 2022).

The emergence of fermionic superfluidity and superconductivity is closely linked to the formation of Cooper pairs. These are strong correlations between pairs of electrons (or other fermions) with opposite spin and momentum localised at the Fermi surface in momentum space. Understanding the mechanism behind pair formation has so far been a challenge. In their new study published in Nature, the research team around Philipp Preiß and Selim Jochim have directly observed Cooper pairs in a mesoscopic two-dimensional Fermi gas. Using an advanced fluorescence imaging technique, they were able to extract spin- and single-atom-resolved momentum distributions with particle-detection fidelities comparable to those of quantum gas microscopes. With precise control over the interactions, particle number and potential landscape, they were able to establish observables that allow to identify different pairing mechanisms and to answer longstanding questions concerning not only such mesoscopic systems but also their connection to the macroscopic world.

Link: Research article by Holten et al. (2022) in Nature.

“Welt der Physik” Podcast with Prof. Ulrich Schwarz on the Physics of Cells

“A cell is the smallest unit of life, in a certain sense the elementary particle of biology” (Ulrich Schwarz). Every living being is made up of cells. The human body for instance consists of over 1013 different cells, which are divided into more than 200 different cell types. In order to understand the complex processes in cells, researchers approach them not only from the biological but also from the physical side. In the new episode of Welt der Physik's podcast, Ulrich Schwarz (ITP, STRUCTURES Heidelberg) explains how much physics is in cells. The podcast is in German.

Link: Welt der Physik: Podcast episode 333: Physik der Zelle

  Special Colloquium by Prof. Steven Chu, May 10, 2022

We are delighted to announce that Prof. Steven Chu, Nobel Laureate in Physics 1997 and former Secretary of Energy under Barack Obama, will give a special colloquium on Tuesday, May 10, 1:15 pm, on: What new biology and biophysics can be learned from nanometer-millisecond tracking of the dynein molecular motor (see the announcement poster). The colloquium will take place in Hörsaal 1 of the Kirchhoff-Institute for Physics (KIP, INF 227). The colloquium will be followed by a Q&A session on Prof. Chu’s current research and former work. Researchers and students from all disciplines are welcome!

  Joint Workshop with FI EMS: From Structures to Functions, IWH May 9, 2022

We are happy to announce that the workshop “From Structures to Functions” jointly organised by the Flagship Initiative Engineering Molecular Systems (FI EMS) and the STRUCTURES Cluster of Excellence is going to take place entirely in presence. The registration is now closed. The workshop will start at 09:00 am at the International Academic Forum Heidelberg (IWH) in Hauptstr. 242 (old town Heidelberg). Participants are asked to use the lower entry at the front of the building.

Please find the schedule with speakers & topics here.

  Symposium Computational Soft Matter and Biophysics May 12 and May 19, 2022

The symposium will take place in hybrid form at the Institute for Theoretical Physics (ITP). Lectures will be held in attendance for invited guests only but will also be broadcast via ZOOM. For more information on the invited speakers and the ZOOM details , please visit ITP's web page on the event or see the associated poster.

  STRUCTURES NEWSLETTER Vol. 6 Apr 2022

We are happy to present the sixth volume of the STRUCTURES newsletter, which features the following topics:

  • Pg. 1: New Centre for Model-Based AI  /  New Quantum Technology Cooperation Projects  /  KIDS: The New Parent-Child Offices of STRUCTURES and ISOQUANT Are Ready For You!
  • Pg. 2: HEGL: The Heidelberg Experimental Geometry Lab
  • Pg. 3: We Are STRUCTURES  /  Save the Date: STRUCTURES YRC Conference Oct. 4–7 2022
  • Pg. 4: STRUCTURES Asks: Anna Marciniak-Czochra

The STRUCTURES Office is happy to answer questions and to receive feedback.

HEGL Community Seminar May 2

We cordially invite you to attend the Heidelberg Experiment Geometry Lab (HEGL) Community Seminar talk by Sean Lawton on May 2 at 3pm:

Title: Dynamics, Finite Fields, and Character Varieties: A Geometry Lab Project Working!
Abstract: In 2014, the Mason Experimental Geometry Lab (MEGL) was founded at George Mason University (GMU). During Fall and Spring of that year, MEGL obtained funding, space, equipment, and participants. In Summer 2015, the first research (and outreach) projects began. One of the first projects explored dynamics on the finite field points of certain algebraic varieties. This project continued every semester and summer until Fall 2018. In addition to interesting conjectures with substantial data to support them and 1000’s of lines of code generating said data, the project created awesome visualizations (images and 3D prints), a GMU-College of Science research award, an undergraduate honors thesis, a PhD thesis, a community of mathematicians (11 student participants, most in PhD programs or in professional scientific positions), and many fond memories. This talk is about that story.

The Seminar will take place online via Zoom. Contact HEGL or join the HEGL Mailing List to get the Zoom coordinates. More information can be found at the HEGL seminar website.

Symposium on Computational Astrophysics May 5 2022

The symposium on Computational Astrophysics will take place on May 5, 2022 in hybrid form. Lectures will be held in attendance for invited guests only but will also be broadcast via ZOOM. For more information, please visit the web page of the Center of Astronomy (ZAH) on the event or see the associated poster.

Reality and probability: from atoms to bacteria and the Earth climate

We cordially invite you to attend the talk by Lamberto Rondoni (Politechnico di Torino) on Reality and probability: from atoms to bacteria and the Earth climate on Friday April 22 at 4.00pm at EMBL, Large Operon.

Registration is no longer required, but it is still mandatory to wear FFP2 masks in seminar rooms. Online access via Zoom: Meeting ID: 910 5345 7980, Passcode: 449594

Abstract: Probability is arguably the most effective mathematical tool that all sciences use. However, probability is not reality, and one should be aware of the relations between them, in order to avoid errors, and actually develop useful predictive theories. In this lecture, I will invite the audience and myself to ponder the matter, illustrating various notions probability and giving examples of how statistical physics understands thermodynamic phenomena. I will then discuss success and failures in the use of probabilities in Physics, and will conclude mentioning some applications of biological and geophysical interest.

SIMPLAIX Inaugural Symposium on April 12

We are happy to announce the SIMPLAIX Inaugural Symposium on April 12. In the new SIMPLAIX collaboration, researchers from HITS, Heidelberg University, and Karlsruhe Institute of Technology (KIT) are addressing challenges in the simulation of biomolecules and molecular materials by pooling their expertise in multiscale computer simulation and machine learning. The collaboration is funded by the Klaus Tschira Foundation and will be launched on 12 April 2022 at Studio Villa Bosch, Heidelberg.

The schedule is available here (PDF).
See also: SIMPLAIX Website

  48th Heidelberg Physics Graduate Days April 11-14, 2022

The 48th Heidelberg Physics Graduate Days of the Heidelberg Graduate School for Physics and the Department of Physics and Astronomy take place on April 11 - 14, 2022. Participants from other universities are very welcome!
Courses are open for advanced students, in particular those working on their Master's and doctoral theses. It is the aim to offer courses that broaden the students' physics knowledge as well as to teach specialized techniques.

Link: Website of the Graduate Days.

'Almost a PhD' lecture Series.

The STRUCTURES Young Researcher's Convent (YRC) is happy to announce another talk in its 'Almost-a-PhD' series:
Tuesday, April 12, 6.00pm: Tobias Haas: An Entropic Perspective on Equilibrium, Uncertainty and Entanglement. (online via Zoom, German).
The talk will be in German this time, as it will be the language of Tobi's defence.

About the 'Almost a PhD' lecture series:
In the 'almost a PhD' talks, PhD students shortly before their defence can practice their PhD talk. The presentation will be followed by questions and, if wanted, a short round of feedback. In this format PhD candidates benefit by practising their talk in front of a live audience and listeners are presented with understandable and hopefully high quality talks about a broad variety of current research topics. And if you are currently in your PhD yourself, you can collect ideas for your own talk in the future! If your defence is coming up and you are keen to practice your talk yourself, send a mail with your topic and your preferred date to the YRC.

STRUCTURES member Dylan Nelson receives Hector RCD Award

Dylan Nelson (Photo: Heidelberg University)
We congratulate Dylan Nelson, who heads an Emmy Noether Research Group at the Centre for Astronomy of Heidelberg University (ZAH), for being awarded the Hector Research Career Development Award. The award is endowed with 25,000 euros and, besides the funding, includes additional money for the establishment of a doctoral position. The Hector Foundation hereby follows the goal of supporting outstanding young researchers on their way towards a professorship.

Dylan Nelson studied at the University of California in Berkeley and at Harvard University (both USA). After earning his doctorate in 2015, he became a post-doctoral researcher at the Max Planck Institute for Astrophysics in Garching near Munich. Since 2020 he has directed the Emmy Noether research group “Computational Galaxy Formation and Evolution”, which explores the origins and development of galaxies with computer support. “We want to understand how gas flows in, out of and around galaxies,” underlines the astrophysicist. In order to understand the evolution of cosmic structures over time, Dr Nelson’s research group is developing numerical simulations. “With the funds from the Award and the additional doctoral position, we can explore new simulation techniques and applications of current machine learning methods,” says Dylan Nelson.
See also:

The new parent-child offices of STRUCTURES and ISOQUANT are ready for you!

Parent-child office at Mathematikon

Do you want to go to the office and have a child with you, or would you like a relaxing nursing room right by your workplace? Then we have the right place for you! “KIDS”, the new parent-child offices at Philosophenweg and Mathematikon, are open to all participants of the STRUCTURES and ISOQUANT projects. Several fully equipped workstations, a group room as well as a quiet room for breastfeeding, a kitchenette and numerous play corners for the little ones are waiting for you. For more information, go to https://ekb.thphys.uni-heidelberg.de/ – register on our website and book your desired workspace flexibly! If you have any questions, please feel free to contact us at any time: ekb@uni-heidelberg.de. We look forward to welcoming you and your kids in our offices!

For more information and pictures, have a look at the KIDS flyer:
Flyer German | English (PDF, 1.6MB).

STRUCTURES NEWSLETTER Feb 2022

We are happy to present the fifth volume of the STRUCTURES newsletter, which features the following topics:

  • Pg. 1: New EPs – ERC Starting Grant for Lauriane Chomaz – Members News
  • Pg. 2: STRUCTURES asks: Lauriane Chomaz
  • Pg. 3: CP 3: Modeling Cell Mechanics with the Finite Element Method
  • Pg. 4: News from the YRC – We Are STRUCTURES
The STRUCTURES Office is happy to answer questions and to receive feedback.

“Welt der Physik” Podcast on Emergence with Manfred Salmhofer

“The whole is greater than the sum of its parts.” This phrase, often attributed to Aristotle, is how one could describe one of the most fascinating, complex properties of nature: Emergence. When several parts of a physical system – whether atoms, birds or stars – interact with each other, new properties can be observed that its single parts do not have on their own. This phenomenon is the focus of the new episode by “Welt der Physik”'s podcast “Emergenz”, in which Manfred Salmhofer from STRUCTURES explains how such emergent properties arise and what role they play in physics.

The podcast is in German and available at the “Welt der Physik” webpage:

Welt der Physik: Folge 330 – Emergenz (in German, Feb. 10, 2022).

NEW DATE: Ruperto Carola Lecture Series STRUCTURES: „Strukturen in der Musik Johann Sebastian Bachs“ on February 7, 2022

We are delighted to announce that Prof. Dr. Andreas Kruse's talk on „Strukturen in der Musik Johann Sebastian Bachs“ will take place on February 7 at 7:30 pm at the Aula der Neuen Universität (Access limited to 2G+, FFP-2 mask mandatory).
The talk, which will be in German, focuses on structure in compositions by Johann Sebastian Bach, explaining the term “structure” in music by the example of Viennese Classicism and analyzing themes and motifs of single works by Bach, before addressing the compositional technique of the fugue. Prof. Dr. Andreas Kruse is expert on music, author of the book „Die Grenzgänge des Johann Sebastian Bach“ and Senior professor distinctus at Heidelberg University.

The event will take place as part of the Ruperto Carola Lecture Series (Ruperto Carola Ringvorlesung) STRUCTURES, which focuses on the emergence and description of structures in mathematics and physics, human society, the human body, literature and music. The lecture series is organized by Matthias Bartelmann, STRUCTURES member, and Manfred Salmhofer, speaker of STRUCTURES.

See the University press release here (in German, February 3, 2022).

New Podcast Episode: Exzellent Erklärt - Spitzenforschung für alle (7)

A new podcast episode of “#exzellenterklaert - Spitzenforschung für alle” is going to air on 2022-02-01:

Episode 07: “Altern: Wie können wir gesund alt werden” (CECAD Cologne)
Why and how do we age? And what can we do to prevent diseases and age healthily? Answers and tips are provided by CECAD Cologne in the new episode of the podcast "#exzellenterklaert – Spitzenforschung für alle".

The Cluster of Excellence CECAD (Cellular Stress Responses in Aging-Associated Diseases) is an interdisciplinary research association of the University of Cologne, the Max-Planck-Institutes for the Biology of Aging and Metabolism, Uniklinik Köln and the DZNE. The cluster aims at decoding molecular mechanisms of aging and age-associated diseases.
The German science podcast “Exzellent Erklärt - Spitzenforschung für alle” on current science topics reflects the research diversity of the Germany’s leading research institutions and Clusters of Excellence: from Antiquities to Quantum Physics. In each episode, listeners can expect insights into the interdisciplinary work of one research network. The researchers of the clusters of excellence, funded by DFG talk to podcaster Larissa Vassilian about how they want to find scientifically sound answers to relevant topics of our time – for the society of tomorrow.

Link: https://exzellent-erklaert.podigee.io/.

STRUCTURES Member Lauriane Chomaz receives ERC Starting Grant

Two outstanding Heidelberg-based early-career researchers – Junior Professor Dr Lauriane Chomaz and Dr Ganna Gryn’ova – have each been awarded an ERC Starting Grant, which is a high amount of funding from the European Research Council (ERC). Prof. Chomaz, an experimental physicist at Heidelberg University, will receive approximately 1.5 million euros for her research work on two-dimensional dipolar quantum gases. The ERC will likewise endow Dr Gryn’ova with around 1.5 million euros for a project on the design and modelling of functional organic materials. The computational chemist from the Heidelberg Institute for Theoretical Studies (HITS) also does research at the Interdisciplinary Center for Scientific Computing (IWR) of Ruperto Carola. The funding has been granted for a period of five years.

Junior Professor Dr Lauriane Chomaz, Physikalisches Institut, STRUCTURES Cluster of Excellence | Image © Tobias Schwerdt

Lauriane Chomaz’s research project to be funded with the ERC Starting Grant is called “Two-dimensional Dipolar Quantum Gases: Fluctuations and Orders” (2DDip). In it, she addresses the question of how matter orders itself under extreme conditions – in two-dimensional space and in the presence of competing long-range and short-range atomic interactions – and how the resultant order changes under the effect of quantum and thermal fluctuations. With the assistance of an innovative experimental apparatus, the scientist will, for the first time, generate ultra-cold quantum gases from dysprosium atoms in an effective two-dimensional space. Dysprosium is a rare earth and exhibits the highest magnetic moment of all natural stable chemical elements. By examining different states of these magnetic gases, Prof. Chomaz wants to gain new insights into hitherto unexplored, exotic states of matter, their respective orders, ordering mechanisms, and their fluctuations. The physicist hopes that her research will help to answer open questions on two-dimensional ordering in the presence of long-range atomic interactions, and to open up new research avenues.

After graduating in quantum physics, Lauriane Chomaz gained her doctorate in 2014 with a study of Bose gases in reduced dimensions at the École normale supérieure in Paris (France). She then continued her research as a post-doc at the University of Innsbruck (Austria). For that she received a Marie Skłodowska-Curie Fellowship from the European Commission and was admitted to the Elise Richter Programme of the Austrian Science Fund (FWF). In 2021 she joined Heidelberg University as a tenure-track professor. Prof. Chomaz is part of the STRUCTURES Cluster of Excellence with her newly formed “Quantum Fluids” research group at the Institute for Physics. She is also a member of Heidelberg University’s Collaborative Research Centre 1225 “Isolated Quantum systems and Universality under extreme conditions” (ISOQUANT).

See University press release from January 19, 2022:
German | English.

Happy New Year and STRUCTURES JOUR FIXE 2022.

The STRUCTURES cluster wishes everyone a bright, healthy and prosperous new year. Despite the ups and downs due to Covid-19, we hope that 2021 has been a successful year for all of our members. We are grateful for the commitment and the fruitful, lively collaboration within and beyond the cluster, which we are looking forward to maintain. For the new year, we are excited to announce many lecture programs, talks, fellowships and guest programs – with the Jour Fixe as the central place to meet and exchange ideas.

The Jour Fixe continues in January with the following guests:

  • January 21: Anna Erzberger (EMBL, Heidelberg) (Postponed)
  • January 28: Fabian Hahner (MI, Heidelberg)
  • February 04: No Jour Fixe - General Assembly

STRUCTURES NEWSLETTER Vol. 4 is now online!

We are happy to present the fourth volume of the STRUCTURES newsletter!

The STRUCTURES Office is happy to answer questions and to receive feedback.

New Podcast: Exzellent Erklärt - Spitzenforschung für alle - Episode 5

A new podcast episode of “#exzellenterklaert - Spitzenforschung für alle” is going to air tomorrow (Dec 15):
Episode (5): “Quantenwissenschaft - Grundlage der Technologien von morgen.” (MCQST)
Quantum physics pushes the limits of our imagination, but builds the foundation for revolutionary new technologies. Researchers from @mcqst_cluster (Munich Center for Quantum Science and Technology) discuss this in the latest episode of the podcast "#exzellenterklaert – Spitzenforschung für alle".

The German science podcast on current science topics reflects the research diversity of the Germany’s leading research institutions and Clusters of Excellence: from Antiquities to Quantum Physics. In each episode, listeners can expect insights into the interdisciplinary work of one research network. The researchers of the clusters of excellence, funded by DFG talk to podcaster Larissa Vassilian about how they want to find scientifically sound answers to relevant topics of our time – for the society of tomorrow.

Link: https://exzellent-erklaert.podigee.io/.

Talk postponed: Faszination Wissenschaft - 60 Begegnungen mit wegweisenden Forschern unserer Zeit by Herlinde Koelbl

We regret that due to the current pandemic situation, Herlinde Koelbl's talk cannot take place on December 16, 2021. But we are planning it for next year! Please stay tuned for the new dates.

Aufgrund der momentanen COVID-Situtation kann der Vortrag von Herlinde Koelbl am 16.12.2021 leider nicht stattfinden. Er wird auf das nächste Jahr verschoben - weitere Informationen folgen!

Talk Announcement: Faszination Wissenschaft - Postponed

Ruperto Carola Lecture Series STRUCTURES starts on November 8

We are delighted to announce that this semester term the Ruperto Carola Lecture Series (Ruperto Carola Ringvorlesung) is organized by Matthias Bartelmann, STRUCTURES member, and Manfred Salmhofer, speaker of STRUCTURES.
On Monday, November 8, Manfred Salmhofer addresses the connection between the diversity of structures that surround us in the natural world and the unity of the laws of nature that underlie them. In addition to lectures by Markus Oberthaler and Matthias Bartelmann from STRUCTURES, we are looking forward to six renowned speakers from philosophy, brain research, psychology, literature, law, and music.
Lectures take place every Monday at 7:30 pm, Aula Neue Universität. The talks will be given in German language.

See press release here (November 4, 2021).

Research: Solving Complex Learning Tasks in Brain-Inspired Computers

STRUCTURES members Andreas Baumbach, Akos Ferenc Kungl, Johannes Schemmel and Mihai Petrovici develop a new training approach for spiking neural networks with their co-workers.

Developing a machine that processes information as efficiently as the human brain has been a long-standing research goal towards true artificial intelligence. The interdisciplinary research team at Heidelberg University and the University of Bern (Switzerland) led by Mihai Petrovici is tackling this problem with the help of biologically-inspired artificial neural networks. Spiking neural networks, which mimic the structure and function of a natural nervous system, represent promising candidates because they are powerful, fast, and energy-efficient. One key challenge is how to train such complex systems. The German-Swiss research team has now developed and successfully implemented an algorithm that achieves such training.

See press release from October 29, 2021 (in English) or from October 29, 2021 (in German).

Original publication in Nature Machine Intelligence from September 17, 2021 (in English).

New Podcast: Exzellent Erklärt - Spitzenforschung für alle

The next episode of “#exzellenterklaert - Spitzenforschung für alle” is online! Learn more about “Bacteria in the Gut - How Drugs Affect our Microbiome,” and listen directly to Lisa Maier, Junior Group Leader at the Tuebingen Cluster of Excellence CMFI.

The German science podcast on current science topics reflects the research diversity of the Germany’s leading research institutions and Clusters of Excellence: from Africa Studies to Quantum Physics. In each episode, listeners can expect insights into the interdisciplinary work of one research network. The researchers of the clusters of excellence, funded by DFG talk to podcaster Larissa Vassilian about how they want to find scientifically based answers to relevant topics of our time - for the society of tomorrow.

Link: https://exzellent-erklaert.podigee.io/.

STRUCTURES NEWSLETTER Vol. 3 is now online!

We are happy to present the third volume of the STRUCTURES newsletter!

The STRUCTURES Office is happy to answer questions and to receive feedback.

STRUCTURES Member Matthias Bartelmann elected as member of the University Council

We congratulate our member Matthias Bartelmann for being elected as member of the University Council!
The University Council oversees the management by the Rectorate. It can at any time give the Science Ministry its opinion on strategic matters concerning the university. It consists of eleven members who are appointed by the Minister for Science, Research and the Arts. Six members, including the chairperson, are leading figures from outside the university; five members, including the deputy chairperson, are members of the university. The term of office of the members, and of the University Council, is three years.

Workshop on Pure Spinors, Superalgebras, and Holomorphic Twists, October 4-8

From 4th to 8th of October the Workshop "Pure Spinors, Superalgebras, and Holomorphic Twists" will take place in hybrid format within the cluster of excellence STRUCTURES at Heidelberg University. The goal of the workshop is to bring together experts working at the intersection between theoretical physics and pure mathematics - with a special emphasis on representation theory, complex, algebraic and derived geometry -, to foster exchange, collaborations and the development of a shared language between these diverse groups.

Talks will take place in the Zoom-extended Mathematikon Hörsaal. Links and further information will be available at the workshop’s homepage.

Workshop on Topological Methods in Data Analysis, October 4-6

From 4th to 6th of October the Second Workshop on Topological Methods in Data Analysis will take place within the cluster of excellence STRUCTURES at Heidelberg University. The three-day workshop includes introductions into the powerful data analysis machinery of persistent homology, tutorial sessions held by Mathieu Carrière, and features invited colloquial talks by Nils Baas, Frédéric Chazal and Rien van de Weygaert. The workshop will take place online only.

Registration for the workshop is open until 1st of October via this form. More information including the detailed schedule can be found on workshop webpage.

STRUCTURES Member Fabian Schneider receives Ludwig-Biermann-Award

We congratulate Fabian Schneider for being awarded the Ludwig-Biermann-Award! With this price, the German Astronomical Society (AG) acknowledges Fabian Schneider's work on the evolution of massive stars, binary stars and supernovae.

Since January 2021, Fabian Schneider started his research group at the Heidelberg Institute for Theoretical Studies (HITS) and joined STRUCTURES in March 2021.

The award ceremonies will take place during the virtual annual meeting of the German Astronomical Society from September 13-17, 2021

See press release here.

New Podcast: Exzellent Erklärt - Spitzenforschung für alle

“Exzellent erklärt - Spitzenforschung für alle” finally goes online on September 1st! The German science podcast on current science topics reflects the research diversity of the Germany’s leading research institutions and Clusters of Excellence, funded by the Deutsche Forschungsgemeinschaft: from Africa Studies to Quantum Physics. In each episode, listeners can expect insights into the interdisciplinary work of one research network. The researchers of the clusters of excellence talk to podcaster Larissa Vassilian about how they want to find scientifically sound answers to relevant topics of our time - for the society of tomorrow.

Link: www.exzellent-erklaert.de.

Awards and Honors for STRUCTURES Members

We congratulate Giulio Beletti and Dieter Heermann! Giulio Belletti has been awarded with a Humboldt research stipent for postdocs. He is member of the STRUCTURES YRC and works with Beatrice Pozzetti at the Mathematical Institute on geometry and topology. Dieter Heermann, Institute for Theoretical Physics, in now member of the International Advisory Board of the Shanghai Jiao Tong University (China).

STRUCTURES welcomes three new members

We are very happy to welcome our three new members Dylan Nelson, Tilman Plehn and Björn Malte Schäfer to STRUCTURES. Dylan Nelson is an Emmy Noether Research Group Leader of the Computational Galaxy Formation and Evolution Group at the Institute for Theoretical Astrophysics, within the Center for Astrophysics (ITA/ZAH). Tilman Plehn is Professor at the Institute for Theoretical Physics, working on particle phenomenology and machine learning. Björn Malte Schäfer leads the Statistics and Cosmology Group at the ARI (Astronomisches Rechen-Institut), within the Center for Astrophysics (ZAH).

STRUCTURES NEWSLETTER Vol. 2 is now online!

We are happy to present the second volume of the STRUCTURES newsletter!

The STRUCTURES Office is happy to answer questions and to receive feedback.

STRUCTURES NEWSLETTER Vol. 1 is now online!

We are happy to present the first edition of the STRUCTURES newsletter!

The STRUCTURES Office is happy to answer questions and to receive feedback.

Workshop on Low Dimensional Quantum Many Body Systems

The workshop will take place at the International Academic Forum in Heidelberg from July 12th to July 16th 2021. Further information can be found here.

STRUCTURES Member Felix Joos receives Lautenschläger Junior Researcher Prize

We congratulate Felix Joos on receiving the Lautenschläger Junior Researcher Prize! Manfred Lautenschläger, the award sponsor and an Honorary Senator of Heidelberg University, describes him as an “enormously productive young researcher, who with creativity, self-determination and technical flexibility is tackling major questions in theoretical computer science and discrete mathematics”.

Since March 2020, Felix Joos is Junior Professor at the Institute for Computer Science, leading the group Theoretical Computer Science and joined STRUCTURES in July 2021. He recently attracted attention with his solution to the “Oberwolfach problem” (2018) and a paper on the “kissing number” (2019).

The festive presentation is to take place on 7 May 2021 as a virtual event, open to the public, and will be livestreamed from the Great Hall of the Old University starting at 17:00. It is accessible via the portal heiONLINE of Heidelberg University.

See press release from April 29, 2021.

STRUCTURES Member Anna Wienhard receives ERC Advanced Grant

We congratulate Anna Wienhard on receiving an ERC Advanced Grant. For her project on Symmetries in Mathematics, she got awarded with about two million Euro over a funding period of five years.

Anna Wienhard is Professor at the Mathematical Institute on Differential Geometry and leads the research group Groups and Geometry at the Heidelberg Institute for Theoretical Studies (HITS). She is Co-Spokesperson of STRUCTURES and Scientific Director of the Research Station Geometry and Dynamics.

See press release from April 22, 2021 (in German).

CP7 Lunch Seminar - Summer Term 2021

We cordially invite you to the newly founded CP7 lunch seminar on selected Wednesdays during the semester. This seminar is an informal meeting for members and anyone who might be interested. Participants take turns at illustrating their area of research or a neighboring field, in 30-minute talks aimed at a broader audience. The goal is to stimulate discussions and explore possible collaborations at the interface between Mathematics and Physics.

For the updated schedule and more information, please visit the CP7 Seminar webpage.

Girl's Day 2021 with STRUCTURES

Discovering physics in a whole new light was the aim of Girls'Day, April 22. At this day it was possible to look behind the curtain of the scientific work of the department of physics and astronomy at Heidelberg University. Welcomed by the dean of the department for physics and astronomy, 120 young girls from all over Germany took part in twelve extraordinary online workshops with diverse topics such as black holes, programming with robots, mysteries of light and the universe.

We thank all participating scientists and are looking forward to taking part next year again. The Girls`Day was jointly supported by STRUCTURES, the Collaborative Research Centre 1225 "Isolated Quantum Systems and universality in extreme conditions", the Collaborative Research Centre 881 "The Milky Way System" and the HighRR Research Training Group.

Watch the introductory video by some of our YRC members about the daily life of a scientist here.

STRUCTURES welcomes four new members

We are very happy to welcome our four new members Jan Johannes, Philipp Preiß, Johannes Schemmel and Fabian Schneider to STRUCTURES. They excellently represent the rich diversity of research areas of the STRUCTURES community. Jan Johannes, leading his group "Statistics of Inverse Problems", is Professor at the Institute for Applied Mathematics. Junior group leader Philipp Preiß from the Kirchhoff-Institute for Physics leads a new project funded by the ERC starting grant "UniRand - Random Unitarities in a Rapid Optical Lattice Simulator". Johannes Schemmel, working on neuromorphic computing, is head of the "Electronic Vision(s) Group" at the Kirhoff-Institute for Physics. Fabian Schneider is Junior group leader of the "Stellar Evolution Theory" group at the Heidelberg Institute for Theoretical Studies.

New STRUCTURES Professorship on Experimental Physics

We are happy to announce that Dr. Lauriane Chomaz has accepted the new STRUCTURES Tenure-Track-Professorship on Experimental Physics. Professor Chomaz, a world leading expert on quantum fluids, explores their behavior using ultracold assemblies of atoms. She joined the STRUCTURES community this February.

Research: The Role of Turbulence in the Birth of Stars

STRUCTURES member Ralf Klessen investigates interstellar gas clouds, as part of an international cooperation.

New level computer simulations reveal the role of turbulence in interstellar molecular clouds in star formation. In their publication, the authors show how their results allow to draw conclusions how this turbulent movement transitions from the supersonic to subsonic regime

The work of this international research team was led by scientists of the Center for Astronomy of Heidelberg University (ZAH) and of the Australian National University in Canberra. The simulations took place at the Leibniz Supercomputing Centre of the Bavarian Academy of Science and Humanities.

See press release from January 11, 2021 (in English) or from January 15, 2021 (in German).

Original publication in Nature Astronomy from January 11, 2021 (in English).

New edition of the Science Pub Quiz

ONLINE SCIENCE PUB QUIZ @ SCIENCE DAYS

Date: Wednesday, 18 November 2020
Time: 07:30pm - 10:30 pm
As this month`s edition will be hosted as part of the Science Days (one of Germany`s oldest science festivals), this quiz edition will be in German only! Nevertheless, there will be many interesting questions like "Why should you pet a basil plant? How would you draw a Dugong? And which quack medicine can turn your skin blue?".
This month`s guest will be Fabian Navarro, who will talk about his current project Eloquentron 3000 (a bot writing poems) and the release of the new book "poesie.exe". You can register here to get all information and the link for participation: https://2020.science-days.digital. If you want to know more about the Science Pub Quiz Heidelberg, just visit the brandnew website: https://www.scipubquiz.de.
Dennis and Lisa have also presented their idea of the Science Pub Quiz at the WissKon2020: https://youtu.be/rp34ZoLRTqg.

Postdoc opening in Theoretical/Mathematical Physics at Heidelberg University

Applications are invited for several postdoctoral appointments at the University of Heidelberg in Theoretical/Mathematical Physics. The appointments are made in the context of the STRUCTURES cluster of excellence, EXC 2181/1 and of the European Research Council "Random Tensors and Field Theory" grant (principal investigator Razvan Gurau). The successful applicant is expected to dedicate part of their research time to working on core topics in the Random Tensors research program.

The deadline for applications is November 22, 2020. The starting date for the appointment is no earlier than September 1, 2021, but can be at a later date. The initial appointment is for two years, but can be extended. The salary is commensurate with experience.
The interested candidates should submit their application through the academicjobsonline website.

Heidelberg University awards special commitment for digital teaching

Heidelberg University awards nine men and women in different categories for their extraordinary commitment in transforming lectures into digital teaching due to the COVID-19 pandemic.
CONGRATULATIONS to Dr. Kilian Schultes und Ruby Ellis, Dr. Nicole Aeschbach, Katharina Anders, Steve Bahn, Prof. Dr. Ullrich Köthe, Dr. Denis Vogel, Dr. Stefan Karcher and Christopher Nunn. The whole article can be found here.

Funding Doctoral Students in Mathematics

The Deutsche Forschungsgemeinschaft extends joint Research Trainig Group 2229 “Asymptotic Invariants and Limits of Groups and Spaces” at Heidelberg University and Karlsruhe Institute of Technology.
Read the full article here.

Scientific Computing Seminar starts on October 15

The Seminar series will start with Ashia Wilson who will present A Dynamical Perspective on Accelerated Methods. Ashia is in transition from Microsoft Research to her soon to start assistant professorship at MIT, and currently based in Heidelberg.
Title: A Dynamical Perspective on Accelerated Methods.
Time: Thursday, 15th of October, 16:15
Place: Online via the Link: https://audimax.heiconf.uni-heidelberg.de/sch-7ge-ntc
Abstract is available here.

Python Course on Topological Methods in Data Analysis

This workshop has been organized by the members of the STRUCTURES Exploratory Project "Mathematics & Data".

In the workshop the participant will be introduced to the main techniques utilized in topological data analysis and their implementation provided by the python package scikit-tda. Introductions to the Mapper algorithm and persistent homology will be complemented by respective hands-on tutorial sessions. The workshop will conclude with an exploratory project of these methods on ‘real data’, which may be provided by the participants.

Registration Deadline: October 11th, 2020 online at
https://docs.google.com/forms/d/e/1FAIpQLSc2V50PhVQTQcXQgL_MtiNeEco8f5Uf7f-9fskO0qckZJnO7g/viewform
Detailed information about the workshop can be found at the website https://micbl.github.io/TDAworkshop/.

Summer Term 2020

EUROPEAN RESEARCH COUNCIL PROMOTES PROJECTS WITH A TOTAL OF APPROXIMATELY 4.5 MILLION EUROS

Three scientists at Heidelberg University are receiving generous support from the European Research Council (ERC), which has awarded each of them an ERC Starting Grant for excellent young researchers. It will fund the research projects of Dr. Philipp Preiss in quantum physics, Dr. Lutz Greb in chemistry and PD Dr. Lucas Schirmer in medicine. ERC resources totalling approximately 4.5 million euros are available for this purpose. The funding period for all three projects is five years.

Further details can be found at press report site of Heidelberg University.

New STRUCTURES Professorship on Mathematical Physics

We are happy to announce that Dr. Razvan G. Gurau has accepted the new STRUCTURES Professorship on Mathematical Physics. Professor Gurau, presently directeur de recherche at CNRS and the center for Theoretical Physics (CPHT) at Ecole Polytechnique in Paris, France, is a world leading expert in the theory of random tensors and its connections to quantum field theory, gravity and topology. He will join the STRUCTURES community this December.

FULL PROFESSORSHIP (W3) IN THEORETICAL PHYSICS

The Institute for Theoretical Physics of the Department of Physics and Astronomy together with the Cluster of Excellence STRUCTURES at Heidelberg University announces an opening for a
FULL PROFESSORSHIP (W3) IN THEORETICAL PHYSICS.

We are looking for an internationally recognized theorist working on quantum physics in the context of quantum simulation, physical aspects of information theory, and the foundations of new methods of information processing and computation. The new professor should establish contact to the Heidelberg research groups in experimental and theoretical physics, and in particular provide theoretical perspectives for future experiments. This professorship is a key component in the Heidelberg cluster of excellence STRUCTURES and in the newly established focus area physics of information/novel methods of computation at the Department of Physics and Astronomy.

Please have a look at the full job ad for further details: Job advertisement

Qualified candidates are invited to submit their application in English including a CV, a list of publications, a list with teaching experience and a research plan in electronic form (pdf) until October 21, 2020 to the Dean, Prof. Dr. T. Plehn, Department of Physics and Astronomy, Im Neuenheimer Feld 226, D-69120 Heidelberg (dekanat@physik.uni-heidelberg.de).

ELLIS LIFE HEIDELBERG RESEARCH UNIT

STRUCTURES members Carsten Rother and Ullrich Köthe participate in the European Laboratory for Learning and Intelligent Systems.

The great potential of artificial intelligence (AI) and machine learning for the life sciences – from basic research in biology to medical applications – has to date largely been neglected.
To leverage that potential in future, researchers from Heidelberg University, the German Cancer Research Center, and the European Molecular Biology Laboratory have founded a new research unit. It aims to support AI research in the life sciences and forge international links with activities in Heidelberg. The unit is part of the European Laboratory for Learning and Intelligent Systems (ELLIS). ELLIS Life Heidelberg will initially be funded by the founding institutions for five years.
More info can be found at the Heidelberg University website.

Physics of the Quark-Gluon Plasma with Mauricio Martinez Guerrero

Title: Initial state fluctuations of QCD conserved charges in high energy nuclear collisions
Abstract: We initialize the Quantum Chromodynamic conserved charges of baryon number, strangeness, and electric charge arising from gluon splitting into quark-antiquark pairs for the initial conditions of relativistic heavy-ion collisions. A new Monte Carlo procedure that can sample from a generic energy density profile is presented, called Initial Conserved Charges in Nuclear Geometry (ICCING), based on quark and gluon multiplicities derived within the color glass condensate (CGC) effective theory. We find that while baryon number and electric charge have nearly identical geometries to the energy density profile, the initial strangeness distribution is considerable more eccentric and is produced primarily at the hot spots corresponding to temperatures of T≳ 400T ≳ 400 MeV for PbPb collisions at √s N N = 5.02 TeV.

Speaker: Dr. Mauricio Martinez Guerrero (North Carolina State University)
Thursday, August 20, 16:00 h, ITP, Online
Link: https://cern.zoom.us/j/99708870674

bw-i brochure Conducting Research in the land of Future!

This is the title of the current brochure from “Baden-Württemberg international” (bw-i), which introduces excellent research landscapes in Baden-Württemberg.
The brochure mainly aims at scientists and people generally interested in science who are eager to receive more information about the Baden-Württemberg research landscape, and who would like to get a broad overview of what this beautiful federal state has to offer in terms of universities, research institutions, etc.
The cluster of excellence STRUCTURES is presented, as well as further institutions from bioeconomy, lightweight construction and industry 4.0. A large variety of examples demonstrate outstandingly what we are working on in this region.

The brochures are available at bw-i as well as in their download center.

Poster 45. GradDays 45. Heidelberg Physics Graduate Days in autumn 2020

The 45th Heidelberg Physics Graduate Days of the Heidelberg Graduate School for Physics and the Department of Physics and Astronomy take place from 5th - 9th October 2020. Participants from other universities are very welcome!
Courses are open for advanced students, in particular those working on their Master's and doctoral theses. It is the aim to offer courses that broaden the students' physics knowledge as well as to teach specialized techniques.

To take part in the 45th Graduate Days please register yourself here.
Website of the Graduate Days here.

STRUCTURES Members Ullrich Köthe and Ulrich Schwarz both give an insight on their research in the current issue of the Ruperto Carola magazine

Read Ullrich Köthes article here
Read Ulrich Schwarzs article here or have a look at the entire issue here.
Group website of Ullrich Köthe.
Group website of Ulrich Schwarz.

NEW PUBLICATION from STRUCTURES MEMBERS

Theory of a resonantly interacting impurity in a Bose-Einstein condensate.

See Original Publication: Drescher M., Salmhofer M, Enss T.: Theory of a resonantly interacting impurity in a Bose-Einstein condensate (published online 10 July 2020).

NEW PUBLICATION from STRUCTURES MEMBERS

Cosmic Waves. Interconnected Gas flows show how Star-Forming Gas accumulates in Galaxies.

Have a look at the Heidelberg University press release here.
See Original Publication: Henshaw, J.D., Kruijssen, J.M.D., Longmore, S.N. et al. Ubiquitous velocity fluctuations throughout the molecular interstellar medium. Nat Astron (2020). or https://doi.org/10.1038/s41550-020-1126-z.

NEW PUBLICATION from STRUCTURES MEMBERS

Experimentally Identifying Effective Theories in Many-Body Systems.

Have a look at the Heidelberg University press release here.
See Original Publication: M. Prüfer, T.V. Zache, P. Kunkel, S. Lannig, A. Bonnin, H. Strobel, J. Berges, and M.K. Oberthaler: Experimental extraction of the quantum effective action for a non-equilibrium many-body system. Nature physics (published online 15 June 2020).

Postponed: Workshop on Low Dimensional Quantum Many-Body Systems

July 12-16, 2021. IWH Heidelberg

Developing new connections in many body quantum theory. Organizing Committee: Nicolò Defenu (ETH Zürich), Tilman Enss (Heidelberg University), Manfred Salmhofer (Heidelberg University).

More information can be found here.

NEW PUBLICATION from STRUCTURES MEMBERS

Quantum Electrodynamics Experiment: Researchers see application in future Quantum Technologies.

Have a look at the Heidelberg University press release here.
See Original Publication: Mil A, Zache TV, Hegde A, Xia A, Bhatt RP, Oberthaler MK, Hauke Ph, Berges J, Jendrzejewski F. A scalable realization of local U(1) gauge invariance in cold atomic mixtures; Science 367, 1128-1130, 2020. DOI: 0.1126/science.aaz5312.

STRUCTURES Member Johannes Walcher gives an insight on Dualities in Mathematics and Physics in the latest issue of the Ruperto Carola magazine

Read the article here or have a look at the entire issue here.
Group website of Johannes Walcher.

STRUCTURES JOUR FIXE: Outlook on summer term 2020.

Summer term 2020, Heidelberg: Lecture by STRUCTURES Postdoc Luca Battistella.

Details can be found here.

Last edition of the Science Pub Quiz on July 29th, 2020

Back and live with limited places!

6th SCIENCE PUB QUIZ IN HEIDELBERG Date: Wednesday, 29 July 2020
Time: 07:30pm (doors open at 7pm)
Venue: Cafe Leitstelle at Dezernat #16
Organizers: Dennis Schulz and Lisa Ringena (both PhD students at Kirchhoff Institute for Physics, Heidelberg).
For the upcoming Science Pub Quiz in Heidelberg will be back in real life! The last edition before the summer break has a total of 40 spots in a well-aired Cafe Leitstelle available for you. As usual, we will ask you sciency questions, a vegetable or fruit might be thrown in water, and we have a wonderful guest: Linn Voss will join us from Berlin, where she does her PhD on toxicology at the Federal Institute for Risk Assessment.
Entrance is free, doors open at 7pm, and questions will be asked both in English and German - and while we welcome all nerds Heidelberg, it will absolutely not be necessary to have studied any science to answer our questions.

Due to the current situation, you have to pre-register via email to sciencepubquiz@posteo.de with your name and, if you'd like to participate in a team, the names of your team members.

Event on Facebook: https://www.facebook.com/events/163768071730688.
All information on the quiz: www.pubquiz-hd.de
Instagram: @science.quiz.hd

STRUCTURES JOUR FIXE: Heidelberg, Online Seminar.

Friday, July 24th, 2020.

'Almost a PhD' lecture Series.

Upcoming talk: Monday, July 20, 18:15, Linda Shen: Universelle Dynamik & Thermalisierung in isolierten Quantensystemen.
The talk will be in German this time, as this will be the language of Linda's defence.

About the 'Almost a PhD' lecture series:
In the 'almost a PhD' talks, PhD students shortly before their defence can practice their PhD talk. The presentation will be followed by questions and if wanted a short round of feedback. In this format PhD candidates benefit by practising their talk in front of a live audience and listeners are presented with understandable and hopefully high quality talks about a broad variety of current research topics. And if you are currently in your PhD yourself, you can collect ideas for your own talk in the future!
After the talk is finished and all questions are answered we would love to invite everyone to a virtual get-together. Grab a beer or snacks in front of your computer and have an informal discussion or chat.
If your defence is coming up and you are keen to practice your talk yourself, write us a mail with your topic and your preferred date. We will supply you with a 'drawing pad' that can be connected to a computer, to simulate an actual blackboard presentation. Speakers can borrow one of these pads and use it for their talk.

STRUCTURES JOUR FIXE: Heidelberg, Online Seminar.

Friday, July 17th, 2020.

STRUCTURES JOUR FIXE: Heidelberg, Online Seminar.

Friday, July 3rd, 2020.

Falling Walls Lab Heidelberg

June 23, 2020. 4 pm. Online Event

Join the Falling Walls Lab Heidelberg and get to know the innovative ideas of their labsters who will present their research, business model, or initiative in a pitch of just 3 minutes each:
To attend the event sign in on https://heika-research.de/en/events/falling-walls-lab-heidelberg.

STRUCTURES JOUR FIXE: Heidelberg, Online Seminar.

Friday, June 5th, 2020.

STRUCTURES JOUR FIXE: Heidelberg, Online Seminar.

Friday, May 29th, 2020.

STRUCTURES JOUR FIXE: Heidelberg, Online Seminar.

Friday, May 15th, 2020.

Science Pub Quiz on May 13th, 2020

New online event this month organized by Lisa Ringena & Dennis Schulz.

Be part of this faboulos event! The livestream starts at 19.30h with brand-new questions.
If you would like to take part, please email to sciencepubquiz@posteo.de.
All information on the quiz: www.pubquiz-hd.de
Facebook event: www.facebook.com/events/231662431545711/
Instagram: @science.quiz.hd

STRUCTURES JOUR FIXE: Online Seminar Series starts with Angkana Rüland.

Friday, May 08, 2020.

Winter Term 2019 / 2020

STRUCTURES JOUR FIXE: Heidelberg, Philosophenweg 12, Room 106.

Friday, February 07, 2020.

STRUCTURES JOUR FIXE: Heidelberg, Philosophenweg 12, Room 106.

Friday, January 31, 2020.

STRUCTURES JOUR FIXE: Heidelberg, Philosophenweg 12, Room 106.

Friday, January 24, 2020.

STRUCTURES JOUR FIXE.

Friday, January 17, 2020, Heidelberg, Philosophenweg 12, Room 106.

    14:30h(!) Can Geometric Hydrodynamics meet Dynamical Data Analysis? (Peter Albers (MI) und Christoph Schnörr (IAM)).
Abstract available here.

Monday, January 13, 2020, INF 205 (MATHEMATIKON), SR3, 14:00h (s.t.): STRUCTURES SEMINAR.

Quasimodular forms from Betti numbers (Pierrick Bousseau, ETH Zürich).

Abstract available here.

STRUCTURES JOUR FIXE.

Friday, December 13, 2019, Heidelberg, Philosophenweg 12, Room 106.

    11:30h The future of Artificial Intelligence (Helmut Linde, Merck KGaA, Darmstadt, Germany).
Abstracts are available here.

STRUCTURES JOUR FIXE.

Friday, December 6, 2019, Heidelberg, Philosophenweg 12, Room 106.

    11:30h Stability and instability of Many-Body Localization (Wojciech de Roeck, KU Leuven).
Abstracts are available here.

Wednesday, November 27, 2019, 18:00h, Heidelberg, INF 227 (KIP), HS2: Öffentlicher Abendvortrag.

Erfolgsfaktoren und Stolpersteine auf dem Karriereweg von Frauen - Strategien für mehr Selbstbehauptung im Job (Sigrid Meuselbach).

Details can be found here.

STRUCTURES JOUR FIXE.

Friday, November 22, 2019, Heidelberg, Philosophenweg 12, Room 106.

    12:45h Welcome with coffee and cake.

    13:30h Eigenvalue problems for nonlinear differential equations.
    (Carl Bender, Washington University, St. Louis, USA).
Abstracts are available here.

STRUCTURES JOUR FIXE.

Friday, November 15, 2019, Heidelberg, Philosophenweg 12, Room 106.

    11:30h Geometry of bounded critical phenomena
    (Giacomo Gori, ITP Heidelberg).

    13:30h Laplacian roots, space sandwiches, spectral methods, and Ising clusters
    (Giacomo Gori, ITP Heidelberg).
Abstracts are available here.

STRUCTURES JOUR FIXE.

Friday, November 8, 2019, Heidelberg, Philosophenweg 12, Room 106.

    11:30h Interplay between structure and function during brain development
    (Ana Millan, Universidad de Granada, Spain).

    11:30h(!) New emergent behavior in networks with higher-order interactions
    (Federico Battiston, Central European University Nador, Hungary).
Abstracts are available here.

November 4-6, 2019, Paris: 1st French-German Meeting in Physics, Mathematics & Artificial Intelligence Theory.

For details, see the following PDF.

STRUCTURES JOUR FIXE.

Friday, October 25, 2019, Heidelberg, Philosophenweg 12, Room 106.

    11:30h Kinetic field theory for cosmic structure formation (Matthias Bartelmann, ITP Heidelberg).
    13:30h Kinetic field theory: more on the generating functional (Matthias Bartelmann, ITP Heidelberg).
Abstracts are available here.

October 11, 2019, Heidelberg: ERC Synergy Grant for STRUCTURES member Ralf Klessen.

Astrophysicist Prof. Dr Ralf Klessen, a researcher at the Centre for Astronomy of Heidelberg University (ZAH), is part of an international research team in receipt of an ERC Synergy Grant – a highly endowed grant from the European Research Council (ERC). Read more...

October 10-11, 2019, Heidelberg: Symposium on Synthetic Quantum Systems.

    For details, see the following PDF.

Contact

Addresses

STRUCTURES Project Management Office
Philosophenweg 12
D-69120 Heidelberg

STRUCTURES Project Management Office
Berliner Str. 47
D-69120 Heidelberg

+49 (0) 6221-54 9186