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

2025/02/20 by Erglis, Andris, Sazhin, Alexander, Vewinger, Frank +3 · 3 citations
#FOS: Physical sciences #Quantum Gases (cond-mat.quant-gas) #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.2502.14986

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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• Unifying framework for non-Hermitian and Hermitian topology in driven-dissipative systems
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