Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Determination of the Superfluid Gap in Atomic Fermi Gases by
  Quasiparticle Spectroscopy   We present majority and minority radiofrequency (RF) spectra of strongly
interacting imbalanced Fermi gases of Li-6. We observed a smooth evolution in
the nature of pairing correlations from pairing in the superfluid region to
polaron binding in the highly polarized normal region. The imbalance induces
quasiparticles in the superfluid region even at very low temperature. This
leads to a local bimodal spectral response, which allows us to determine the
superfluid gap \Delta and the Hartree energy U.

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The categories of this paper are: comp-gas
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The categories of this paper are: stat
14
The categories of this paper are: math-ph
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The categories of this paper are: econ
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
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The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
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The categories of this paper are: cmp-lg