Breakdown of gauge invariance in ultrastrong-coupling cavity QED
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DOI: 10.1103/physreva.98.053819
Abstract: We revisit the derivation of Rabi- and Dicke-type models, which are commonly used for the study of quantum light-matter interactions in cavity and circuit QED. We demonstrate that the validity of the two-level approximation, which… read more here.
Keywords: gauge invariance; gauge; ultrastrong coupling; breakdown gauge ... See more keywords