We study the laser-driven Dicke model beyond the rotating-wave approximation. For weak coupling of the system to environmental degrees of freedom the dissipative dynamics of the emitter-cavity system is described by the Floquet master equation. Projection of the system evolution onto the emitter degrees of freedom results in non-Markovian behavior. We quantify the non-Markovianity of the resulting emitter dynamics and show that this quantity can be used as an indicator of the dissipative quantum phase transition occurring at high driving amplitudes.
@article{arxiv.1708.00292,
title = {Non-Markovian dynamics of few emitters in a laser-driven cavity},
author = {D. Pagel and H. Fehske},
journal= {arXiv preprint arXiv:1708.00292},
year = {2017}
}