Author

Julian Schmitt

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Preprint Sep 2026

Limit Cycles in a Photonic Dimer with Tuneable Non-Hermitian Interactions

Interactions govern the emergence of collective behaviour in classical and quantum many-body systems. While conservative interactions are well known to generate nonlinear phenomena ranging from self-trapping to pattern formation, it remains largely unexplored whether purely dissipative -- i.e., non-Hermitian -- interac...

K. Peters, Peter Schnorrenberg, D. Ehrmanntraut et al. · 0 citations

Open access Nov 2025

Observation of critical scaling in the Bose gas universality class

Critical exponents characterize the divergent scaling of thermodynamic quantities near phase transitions and allow for the classification of physical systems into universality classes. While quantum gases thermalizing by interparticle interactions fall into the XY model universality class, the ideal Bose gas has been p...

Leon Kleebank, Frank Vewinger, A. Camacho-Guardian et al. · Science Advances · 1 citation

Preprint Sep 2026

Fluctuations of a Photon Bose-Einstein Condensate Coupled to a Reservoir: Describing Coherence Properties in a Free-Energy Model

Photons are mutually nearly noninteracting particles, so thermalized photon ensembles are commonly obtained not from direct particle-particle-interactions but rather from contact with matter, which can constitute a reservoir for the photon gas. We develop a theory model for photons in a material-filled (e.g. liquid dye...

Martin Weitz, A. Redmann, R. Panico et al. · 0 citations