Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological Coherent Modes in Trapped Bose Gas   The report reviews the problem of topological coherent modes, which are
nonlinear collective states of Bose-condensed atoms. Such modes can be
generated by means of alternating external fields, whose frequencies are in
resonance with the transition frequencies between the related modes. The Bose
gas with generated topological coherent modes is a collective nonlinear analog
of a resonant atom. Such systems exhibit a variety of nontrivial effects, e.g.:
interference fringes, interference current, mode locking, dynamic transitions,
critical phenomena, chaotic motion, harmonic generation, parametric conversion,
atomic squeezing, and entanglement production.

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The categories of this paper are: dg-ga
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: econ
3
The categories of this paper are: physics
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The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-alg
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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: hep-th
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The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci