Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasi One-Dimensional Bosons in Three-dimensional Traps: From Strong
  Coupling to Weak Coupling Regime   We analyze a recent experiment on a Tonks-Girardeau gas of $^{87}$Rb atoms
(T. Kinoshita, T. Wenger, and D.S. Weiss, Science {\bf 305}, 1125 (2004)). We
find that the experimental data are compatible with the one-dimensional theory
of Lieb, Seiringer and Yngvason (Phys. Rev. Lett. {\bf 91}, 150401 (2003)) but
are better described by a theory that takes into account variations in the
transverse width of the atomic cloud. By using this theory we investigate also
the free axial expansion of the $^{87}$Rb gas in different regimes:
Tonks-Girardeau gas, one-dimensional Bose-Einstein condensate and
three-dimensional Bose-Einstein condensate.

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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: q-fin
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The categories of this paper are: eess
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: physics
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an