Fluorescence spectrum and thermalization in a driven coupled cavity array
Abstract
We calculate the fluorescence spectra of a driven lattice of coupled cavities. To do this, we extend methods of evaluating two-time correlations in infinite lattices to open quantum systems; this allows access to momentum-resolved fluorescence spectrum. We illustrate this for a driven-dissipative transverse-field anisotropic XY model. By studying the fluctuation-dissipation theorem, we find the emergence of a quasithermalized steady state with a temperature dependent on system parameters; for blue-detuned driving, we show this effective temperature is negative. In the low excitation density limit, we compare these numerical results to analytical spin-wave theory, providing an understanding of the form of the distribution function and the origin of quasithermalization.
Citation
Kilda , D & Keeling , J 2019 , ' Fluorescence spectrum and thermalization in a driven coupled cavity array ' , Physical Review Letters , vol. 122 , no. 4 , 043602 . https://doi.org/10.1103/PhysRevLett.122.043602
Publication
Physical Review Letters
Status
Peer reviewed
ISSN
0031-9007Type
Journal article
Description
Funding: EPSRC CM-CDT (EP/L015110/1) (DK), EPSRC program TOPNES (EP/I031014/1) (JK).Collections
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