Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Visualization of Dimensional Effects in Collective Excitations of
  Optically Trapped Quasi-Two-Dimensional Bose Gases   We analyze the macroscopic dynamics of a Bose gas axially confined in an
optical lattice with a superimposed harmonic trap, taking into account weak
tunneling effect. Our results show that upon transition to the
quasi-two-dimensional (2D) regime of the trapped gas, the 3D equation of state
and equilibrium density profile acquire corrections from 2D many-body effects.
The corresponding frequency shift in the transverse breathing mode is
accessible within current facilities, suggesting a direct observation of
dimensional effects. Comparisons with other relevant effects are also
presented.

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The categories of this paper are: cs
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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ph
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The categories of this paper are: adap-org
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The categories of this paper are: supr-con
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The categories of this paper are: stat
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas