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TUE: Tuesday Contributed Sessions

TUE 11: Quantum Optics and Quantum Computation

TUE 11.4: Talk

Tuesday, September 9, 2025, 15:00–15:15, ZHG104

Thermodynamics of the micromaser — •Anja Seegebrecht and Tanja Schilling — University of Freiburg, Freiburg, Germany

The micromaser is a very simple model to study light-matter interactions and a prototypical example in quantum optics. It can also be used in various ways to discuss quantum thermodynamics. The interaction of thermal atoms with the cavity can be interpreted as a the action of a heat bath since field ends up in a Gibbs state. But the relaxation towards steady state can be non-monotonic. This is a peculiar feature for a thermalization process. Additionally we observe that heating and cooling happen at different rates. The trapping state feature can be used to construct a quantum battery model. With coherent atoms actually useful work (ergortropy) can be stored in the cavity by preparing a pure state. We explore the charging power, extraction protocols and stability of this setup.

Keywords: micromaser; quantum battery; relaxation