Newsroom
Stay informed with our latest news and announcements on this page. For more in-depth content, we also encourage visitors to explore our bimonthly STRUCTURES Newsletter magazine, which features a variety of articles, interviews with members, and background information on our latest research and activities.
We are delighted to announce the next event in our Machine Learning Galore! series, focusing on Scientific Machine Learning, which will take place on Thursday, January 16, from 4:30 to 6:00 pm at INF 205 Mathematikon (5th floor). The event will feature lab presentations by principal investigators, followed by brief presentations from junior scientists showcasing their latest work. Extended discussions will offer ample opportunity for in-depth exchanges. In order to participate, please register for free at the ML-AI portal.
Event Details:
- Lab Presentations:
- Fruzsina Molnár-Gábor (Faculty of Law of Heidelberg University, and BioQuant Center Heidelberg)
- Dominik Niopek (Institute for Pharmacy and Molecular Biotechnology Heidelberg)
- Björn Malte Schäfer (Center for Astronomy, Heidelberg University)
- Science Talks:
- Timo Weiß (Molnár-Gábor Lab): Responsible AI? Responsible People!
- Benedict Wolf (Niopek Lab): ML-Guided Engineering of Switchable Proteins
- Tobias Röspel (Schäfer Lab): Statistical Mechanics Meets Bayesian Inference and Machine Learning
About Scientific Machine Learning
Scientific Machine Learning is a collaborative initiative by the Interdisciplinary Center for Scientific Computing (IWR) and the STRUCTURES Cluster of Excellence. Its mission is to foster interaction and exchange within the local machine learning community, and to support its development by consolidating activities and resources that might otherwise remain scattered across individual institutions or disciplines. The initiative aligns closely with the objectives of STRUCTURES, which aims to advance fundamental research, and with IWR’s focus on applying machine learning to address long-standing challenges in the natural and life sciences, engineering, and the humanities.
Further information:
For her research project “The formation of dormant black hole binaries: a key to mass transfer and stellar dynamics (DoBlack),” the German Research Foundation (DFG) has granted STRUCTURES Professor Michela Mapelli, astrophysicist at the Center for Astronomy of Heidelberg University (ZAH), around half a million euros.
The DoBlack project will investigate the formation of so-called dormant black holes in binary star systems – pairs where one companion is a black hole that shows no signs of mass transfer, typically detectable through X-ray emissions. These “silent” black holes have attracted increasing interest in recent years. While black holes detected with gravitational wave interferometers often represent the tip of the iceberg of the population with extreme orbital properties, dormant binaries are thought to be more representative of the black hole population in the local Universe.
To date, only a handful of such systems have been observed. However, the forthcoming fourth data release of the Gaia astrometric satellite is expected to identify several hundreds to thousands of these dormant black holes. Already, Gaia data has led to the discovery of three such systems. The orbital period of the first two of them, Gaia BH1 and BH2 (186 and 1300 days, respectively) is a puzzle for astrophysical models: too tight to be explained with a non-interacting system and too large for a binary star that evolved via unstable mass transfer.
DoBlack will address these puzzles by employing advanced numerical simulations. “DoBlack is a natural and exciting extension in understanding the formation of the new class of BH binaries,” resumes Mapelli. The goal of DoBlack is to model the formation of dormant black holes with new binary evolution models, star cluster simulations, and a comprehensive exploration of the parameter space. “We aim to reconstruct the most likely formation pathways of dormant black holes and provide a key to explain the seemingly impossible orbital period of Gaia BH1 and BH2,” says Michela Mapelli.
Michela Mapelli has led the DEMOBLACK group at the Center for Astronomy of Heidelberg University (ZAH) since July 2023 and is a member of the STRUCTURES Excellence Cluster. Her main research focus is understanding the formation of astrophysical black holes.
Further information:
STRUCTURES Professor Michela Mapelli Appointed as Humboldt Scouting Sponsor for Early-Career Researchers
We are delighted to announce that Alexander von Humboldt Foundation has appointed STRUCTURES Professor Michela Mapelli, astrophysicist at the Center for Astronomy of Heidelberg University (ZAH), as a Henriette Herz Scout.
The Alexander von Humboldt Foundation's Henriette Herz Scouting Programme invites international researchers to conduct research projects in Germany. As a scout, STRUCTURES Professor Michela Mapelli now has the opportunity to identify three excellent researchers in the early stages of their careers and recommend them directly for a Humboldt Fellowship. Humboldt Scouts are selected based on their outstanding research achievements and excellence in mentoring.
Michela Mapelli has led the “Demography of Black Hole Binaries in the Era of Gravitational-Wave Astronomy” (DEMOBLACK) group at the Center for Astronomy of Heidelberg University (ZAH) since July 2023. Her main research focus is understanding the formation of astrophysical black holes.
“I am very excited to become a Humboldt Scout. My priority will be to bring to Heidelberg outstanding early-career scientists who show promise of becoming leaders in the fields of Computational Astrophysics and Gravitational-Wave Astronomy,” says Michela Mapelli. “I will focus on identifying excellent female young researchers as well as candidates from disadvantaged backgrounds and underrepresented minorities.”
The Henriette Herz Scouting Programme enables three international scientists to do research at the ZAH with a Humboldt Fellowship. Young talents as well as experienced researchers are eligible. The sponsorship period is 24 months for postdocs and 18 months for experienced researchers. Financed by the Federal Ministry of Education and Research (BMBF), the programme has opened up a new way of accessing the Humboldt Research Fellowship. The new, active scouting procedure enables successful academics in Germany to directly approach highly sought-after candidates from abroad who have so far not applied to the Foundation and invite them to conduct joint research at their institutions. In a competitive peer-review process, the Humboldt Foundation annually selects up to 40 scouts who will then themselves identify junior researchers abroad and recommend them to the Foundation. Both in terms of subject and region, the programme thus recruits new collaborative partners for Germany. It also seeks to increase the percentage of women sponsored under the Humboldt Research Fellowship Programme.
Further information:
Building a Fluid Atom by Atom: Researchers Study Emergent Hydrodynamic Behaviour of a Few-Fermion System
Macroscopic fluid dynamics is usually thought to emerge from vast numbers of microscopic particles. Now, scientists have studied fluid-like behaviour in systems of as few as ten ultracold lithium atoms.
How many particles does it take to form a fluid? A new study led by STRUCTURES researchers, published in Nature Physics, reveals that fluid-like collective behaviour can emerge with as few as ten ultracold lithium atoms. Inspired by observations in high-energy nuclear collisions, where similar phenomena are seen in systems with only a few dozen constituents, the researchers explored the onset of collectivity in quantum systems.
By precisely controlling the number of atoms and the strength of their interactions, they observed elliptic flow – a striking inversion of the initial aspect ratio that is a hallmark of hydrodynamic behaviour. This phenomenon, typically associated with much larger systems, challenges the conventional understanding that elliptic flow requires vast numbers of particles.
The study not only challenges long-held assumptions but also provides access to observables that remain elusive in high-energy nuclear collisions. This interdisciplinary effort, combining advanced experiments and theoretical modelling, paves the way for a deeper understanding of collective phenomena in quantum systems and opens exciting new avenues for research at the interface of quantum physics and particle physics.
Further information:
- Original Publication: Brandstetter, S., Lunt, P., Heintze, C. et al. Emergent interaction-driven elliptic flow of few fermionic atoms. Nat. Phys. (2025).
- News & Views: Fluids constructed atom by atom.
- STRUCTURES Blog post: The Curious Case of the World’s Smallest Fluid.
- Jochim Labs: Ultracold Quantum Gases.
Click on the image to open the newsletter as PDF. We are happy to present the 18th volume of the STRUCTURES Newsletter, featuring research news, background articles and interviews. The topics of this edition are:
- New Simulations Reveal That the Positioning of Stress
- Fibres in Cells Follows a Minimization Principle
- Lauriane Chomaz Promoted to Full Professor
- The Exploratory Projects of STRUCTURES – A Five Year Success Story
- STRUCTURES Welcomes New YAM Fellows
- Astrid Eichhorn Receives ERC Consolidator Grant
- Ruprecht-Karls Prizes for YRC Members Friederike Ihssen and Lynton Ardizzone
- YRC Member Malek Alhajkhouder Receives Rhodes Scholarship
- Recap: Schöntal Workshop 2024
The STRUCTURES Project Management Office is happy to answer questions.
Scientists at Heidelberg University have achieved a groundbreaking milestone in quantum physics: the creation of a Laughlin fractional quantum Hall state using just two ultracold fermions.
“The whole is greater than the sum of its parts” – this phrase often attributed to Aristotle captures the essence of one of the most intriguing phenomena in nature: emergence. When several parts of a physical system interact, new properties can arise that its single parts do not have on their own. A striking example is the collective behaviour of quantum many-body systems, which can produce novel effects like low-energy excitations carrying a fraction of an electron's charge.
Researchers from the group of STRUCTURES' principal investigator Prof. Selim Jochim at Heidelberg University, in collaboration with Philipp Preiss from LMU Munich, have made significant progress in understanding the emergence of fractional charges. By trapping and spinning a single pair of ultracold lithium-6 atoms in optical tweezers, they replicated the topological properties of this exotic state, previously seen only in bosonic systems. Using a tailored rotation to mimic the influence of a magnetic field, they achieved a strongly correlated atomic state described by physicist Robert Laughlin's wave function for the fractional quantum Hall effect, characterized by its collective and topological nature.
This accomplishment marks a crucial step in the study of emergence of topological phases of matter and paves the way to exploring more complex states, such as quantum Hall ferromagnetism and topological p-wave superconductors.
Further information:
- Publication 1: P. Lunt, P. Hill, J. Reiter, P. M. Preiss, M. Gałka, S. Jochim, Phys. Rev. Lett. 133, 253401 (2024)
- Publication 2: P. Lunt, P. Hill, J. Reiter, P: M. Preiss, M. Gałka, S. Jochim, Phys. Rev. A 110, 063315 (2024)
- APS Physics Viewpoint Article: Ultracold Fermions Enter the Fractional Quantum Hall Arena
- Selim Jochim's group
Prof. Wolfram PerniceMost important research advancement prize honors the experimental work on integrated photonics by Prof. Wolfram Pernice and his team.
We are proud to announce that our member Wolfram Pernice has been awarded the prestigious Gottfried Wilhelm Leibniz Prize of the German Research Foundation (DFG). The award honors his groundbreaking pioneering work on neuromorphic photonic computing, a transformative field at the intersection of physics, computer science, and engineering.
Prof Wolfram Pernice heads the research group Neuromorphic Quantum Photonics at Kirchhoff Institute for Physics and is part of STRUCTURES' Comprehensive Project CP 5: Quantum Systems and Neural Networks: Computation in Physical Structures. The goal of his research in the field of integrated photonics is to develop new methods for information processing and rapid computation using light. By developing nanoscale chip systems, his research has far-reaching implications for artificial intelligence and quantum technologies. The DFG underlines that his interdisciplinary research crosses traditional boundaries; it impacts on various disciplines – from natural sciences to computer science to engineering sciences. “His research results point the way to innovative, sustainable methods for reducing energy consumption of AI computer hardware and still enabling rapid calculations. Furthermore, he is known worldwide as a pioneer in the field of integrated quantum photonics,” the German Research Foundation adds.
The Gottfried Wilhelm Leibniz Prize – the most important research award in Germany – has been awarded annually by the German Research Foundation since 1986. Up to ten prizes can be awarded each year with prize money of 2.5 million euros each. The awards for 2025 go to four female and six male researchers, including Wolfram Pernice. An award also goes to mathematician Prof. Angkana Rüland, a former member of STRUCTURES who did research on applied mathematics at Heidelberg University from 2020 to 2023. The purpose of the Leibniz Programme, established in 1985, is to honor outstanding scientists, to expand their research opportunities and facilitate employment of particularly qualified early-career researchers. The award ceremony will take place on 19 March 2025 in Berlin.
Further information: