Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectrum of coherently backscattered light from two atoms   We present a detailed analytical and numerical analysis of the inelastic
coherent backscattering spectrum of laser light incident on cold atoms. We
identify frequency domains where the interference contribution can be positive
\emph{as well as} negative -- or exhibits dispersive character. These
distinctive features are explained by reciprocity arguments and dressed state
two-photon scattering amplitudes.

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The categories of this paper are: mtrl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-th
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The categories of this paper are: adap-org
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-lat