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Q: Fachverband Quantenoptik und Photonik
Q 9: Open Quantum Systems and Spin-Boson Systems I
Q 9.3: Talk
Monday, March 2, 2026, 17:30–17:45, P 4
Interplay of collective radiance and particle statistics in quantum degenerate gases — •Julian Lyne1,2, Nico Bassler3, Kai Phillip Schmidt2, and Claudiu Genes3,1 — 1Max Planck Institute for the Science of Light, Staudtstraße 2, 91058 Erlangen, Germany — 2Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstraße 7, 91058 Erlangen, Germany — 3Technische Universität Darmstadt, Hochschulstraße 4, 64289 Darmstadt
We investigate the interplay of collective radiance and particle statistics in a dual-species quantum degenerate gas in a harmonic trap, where the two species correspond to the electronic ground and excited states of a bosonic or fermionic two-level system. The dissipative dynamics are modeled by a Lindblad master equation quartic in the field operators, which conserves the total particle number. We show how Dicke superradiance and variants thereof emerge in this description. Further, we show how the effects of particle statistics diminish at finite temperature and finite density, and the dynamics of distinguishable particles emerge.
Keywords: Open quantum systems; Lindblad master equation; Quantum degenerate gases; Superradiance