# Thermodynamics of ultrastrongly coupled light-matter systems

@article{Pilar2020ThermodynamicsOU, title={Thermodynamics of ultrastrongly coupled light-matter systems}, author={Philipp Pilar and D. D. Bernardis and P. Rabl}, journal={Quantum}, year={2020}, volume={4}, pages={335} }

We study the thermodynamic properties of a system of two-level dipoles that are coupled ultrastrongly to a single cavity mode. By using exact numerical and approximate analytical methods, we evaluate the free energy of this system at arbitrary interaction strengths and discuss strong-coupling modifications of derivative quantities such as the specific heat or the electric susceptibility. From this analysis we identify the lowest-order cavity-induced corrections to those quantities in the… Expand

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