SAMOP 2021 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 6: Quantum Gases and Matter Waves (joint session Q/A)

Q 6.4: Poster

Tuesday, September 21, 2021, 16:30–18:30, P

Exploring the nature of the steady state of non-interacting fermionic atoms coupled to a dissipative cavity — •Jeannette De Marco, Catalin Halati, Ameneh Sheikhan, and Corinna Kollath — Physikalisches Institut, University of Bonn, Nussallee 12, 53115 Bonn, Germany

We investigate the influence of a strong symmetry of the Liouvillian on the nature of the steady state for a non-interacting fermionic chain globally coupled to a lossy optical cavity. Using a newly developed many-body adiabatic elimination technique, we capture the dissipative nature of the quantum light field as well as the global coupling to the cavity mode beyond the mean-field ansatz. For finite systems, we show that the existence of a strong symmetry leads to multiple steady state solutions and we investigate how the dissipative phase transition to self-organized states occurs for the different symmetry sectors.