Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Input-output theory of cavities in the ultra-strong coupling regime: the
  case of a time-independent vacuum Rabi frequency   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 be applied to the case of intersubband transitions in
doped semiconductor quantum wells embedded in a microcavity. The coupling of
the intracavity photonic mode and of the electronic polarization to the
external, frequency-dependent, dissipation baths is taken into account by means
of quantum Langevin equations in the input-output formalism. Observable spectra
(reflection, absorption, transmission and electroluminescence) are calculated
analytically in the case of a time-independent vacuum Rabi frequency.

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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ph
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The categories of this paper are: atom-ph