Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bragg scattering of light in a strongly interacting trapped Fermi gas of
  atoms   We study Bragg scattering of laser light by trapped Fermi atoms having two
hyperfine spin components in the unitarity-limited strongly interacting regime
at zero temperature. We calculate the dynamic structure function of the
superfluid trapped Fermi gas in the unitarity limit. Model calculation using
local density approximation shows that, the superfluid pairing gap in the
unitarity limit is detectable from the measurements of dynamic structure
function by Bragg spectroscopy, while in the weak-coupling BCS limit, the gap
eludes such spectroscopic detection.

17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ