Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Current response, structure factor and hydrodynamic quantities of a two-
  and three-dimensional Fermi gas from the operator-product expansion   We apply the operator-product expansion to determine the asymptotic form of
the current response of a Fermi gas in two and three dimensions. The
leading-order term away from the one-particle peak is proportional to a
quantity known as the contact, the coefficient of which is determined exactly.
We also calculate the dynamic structure factor and the high-frequency tails of
the spectral viscosities as a function of the scattering length. Our results
are used to derive certain sum rules for the viscosities.

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The categories of this paper are: astro-ph
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The categories of this paper are: patt-sol
15
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
28
The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
3
The categories of this paper are: physics
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
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The categories of this paper are: nlin