Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-integrability of the semiclassical Jaynes--Cummings models without
  the rotating-wave approximation   Two versions of the semi-classical Jaynes--Cummings model without the
rotating wave approximation are investigated. It is shown that for a non-zero
value of the coupling constant the version introduced by Belobrov, Zaslavsky,
and Tartakovsky is Hamiltonian with respect to a certain degenerated Poisson
bracket. Moreover, it is shown that both models are not integrable.

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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: hep-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
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The categories of this paper are: supr-con
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The categories of this paper are: gr-qc
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The categories of this paper are: atom-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph