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Input-output theory of cavities in the ultrastrong coupling regime: The case of time-independent cavity parameters

Input-output theory of cavities in the ultrastrong coupling regime: The case of time-independent cavity parameters

We present a full quantum theory for the dissipative dynamics of an optical cavity in the ultra-strong light-matter coupling regime, in which the vacuum Rabi frequency is comparable to the electronic transition frequency and the anti-resonant terms of the light-matter coupling play an important role. In particular, our model can …