Comment on "System-environment coupling derived by Maxwell's boundary conditions from the weak to the ultrastrong light-matter coupling regime"

Abstract

In a recent work [arXiv:1301.3960], Bamba and Ogawa developed a microscopic model describing the field of a photonic cavity coupled to a matter exciton-like resonance. One of the results they obtain studying such a model is that, in the ultrastrong coupling regime, usually safe approaches can give wrong results for the dissipation rates of the polaritonic excitations. In particular the dissipation rates calculated applying the rotating wave approximation on the system-environment coupling qualitatively differ from the ones calculated using a microscopic theory based on the quantum electrodynamics for dielectric media. Here I show that this result is an artifact, caused by an inconsistent application of the rotating wave approximation and by a questionable parameter choice.

Comment on: M. Bamba and T. Ogawa, Phys. Rev. A 88, 013814 (2013) [arXiv:1301.3960]

References in corpus (3)

• Input-output theory of cavities in the ultra-strong coupling regime: the case of a time-independent vacuum Rabi frequency
• Light-matter decoupling in the deep strong coupling regime: The breakdown of the Purcell effect
• Dissipation and detection of polaritons in ultrastrong coupling regime

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