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arXiv · 2502.14986

Time-periodic driving of a bath-coupled open quantum gas of light

Andris Erglis·Alexander Sazhin·Frank Vewinger·Martin Weitz·Stefan Yoshi Buhmann·Julian Schmitt
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Abstract

We study the frequency-resolved density response of a photon Bose-Einstein condensate coupled to a bath of dye molecules by time-periodic driving. By monitoring the photon number dynamics for different drive frequencies, we obtain the spectral response of the condensate in a phase-sensitive way. We find that as the photon number increases, the response of the coupled condensate-bath system transitions from overdamped to resonant behavior, indicating a transition from closed to open system dynamics. Our spectroscopy method paves the way for studies of collective excitations in complex driven-dissipative systems.

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Andris Erglis, Alexander Sazhin, Frank Vewinger, Martin Weitz, Stefan Yoshi Buhmann, Julian Schmitt. 2025-02-20. Time-periodic driving of a bath-coupled open quantum gas of light. https://doi.org/10.1103/922g-1fng

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