Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Density Fluctuations in Uniform Quantum Gases   Analytical expressions are given for the static structure factor S(k) and the
pair correlation function g(r) for uniform ideal Bose-Einstein and Fermi-Dirac
gases for all temperatures. In the vicinity of Bose Einstein condensation (BEC)
temperature, g(r) becomes long ranged and remains so in the condensed phase. In
the dilute gas limit, g(r) of bosons & fermions do not coincide with
Maxwell-Boltzmann gas but exhibit bunching & anti-bunching effect respectively.
The width of these functions depends on the temperature and is scaled as \surd
(inverse atomic mass). Our numerical results provide the precise quantitative
values of suppression/increase (antibunching and bunching) of the density
fluctuations at small distances in ideal quantum gases in qualitative agreement
with the experimental observation for almost non-trapped dilute gases.

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The categories of this paper are: physics
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The categories of this paper are: ao-sci
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The categories of this paper are: math
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The categories of this paper are: chem-ph
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The categories of this paper are: econ
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-lat
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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: funct-an
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The categories of this paper are: cs
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The categories of this paper are: stat
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The categories of this paper are: hep-ph