Optical Quantum Systems

We are a new research group at the Kirchhoff-Institute for Physics

 

Our group explores optical quantum systems to study emergent many-body phenomena.

Quantum fluids of light can be experimentally realized within nanostructured material-filled optical resonators. Utilizing the light-matter interactions in this platform, we conduct fundamental studies on thermodynamics and quantum-statistical effects.

Specifically, we explore how topological states can arise in photonic structures under finite-temperature conditions, how complex networks of optical condensates can be employed as physical computers for optimization problems, or how quantum many-body states of light, e.g. photon superfluids, can be synthesised at room temperature. Unravelling such open questions is at the forefront of today’s research in quantum physics and may lead to new applications for future quantum technologies.

 

Contact & Opportunities

To learn more about our research you can take a look at at our previous publications.
Current teaching activities can be found here.

You can contact us directly with any questions or attend Prof. Dr. Schmitt's office hours on Tuesdays from 1:00 to 2:00 p.m.

PhD and Postdoc positions are available in our group! And we always offer thesis projects for Bachelor and Master students, as well as HiWi jobs. Interested? Contact us to learn more!

In our group we are committed to building an open and diverse research environment.

News

Julian's Lecture @Physics Graduate Days: EINSTEINS's BOX: THE PHYSICS OF QUANTUM GASES OF LIGHT.

Prof. Dr. Julian Schmitt delivers a lecture series titled "EINSTEINS's BOX: The Physics of Quantum Gases of Light" during Physics Graduate Days from 5th to 9th October! 

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2026-09-30

Our Bachelor students Katharina, Jakob, Pit & Liam!

Welcome to our Bachelor students!

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2026-09-28

Martin, Tillmann & Levi join the group!

Welcome to our new Master students!

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2026-09-22

Photonic Limit-Cycles: Arxiv Preprint!

New arXiv preprint on non-Hermitian limit cycles in coupled photon condensates

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2026-09-15

Quan­tum Gases of Light exhibit Critical Behaviour

Experiments on quantum gases of photons in the research group of Prof. Schmitt provide new insights into the physics of phase transitions and reveal a critical exponent.

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2026-08-27

Archive

Not the latest news, but still worth a read. Take a look in our news archive.

CQD Colloquium (winter term 2026/27)

Zentrum für Quantendynamik Kolloquium
Kirchhoff-Institut, INF 227 SR 1.403
Wednesday, 7. October 2026
10:30 am Quench Spectroscopy of a Stron...
Dr. Yanliang Guo, School of Physics, Renmin University of China

Gallery

SUPPORT & COUNSELLING

Funding

Optical Quantum Systems
Prof. Dr. Julian Schmitt
Kirchhoff-Institut for Physics, EINC 
Im Neuenheimer Feld 225a (02.121)
69120 Heidelberg
06221/54-16072
Contact
Team assistant
Natasja Staelens
Kirchhoff-Institut für Physik, EINC 
Im Neuenheimer Feld 225a (02.122)
69120 Heidelberg
06221 / 54-16071
Contact