Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Triplet pair amplitude in a trapped $s$-wave superfluid Fermi gas with
  broken spin rotation symmetry   We investigate the possibility that the broken spatial inversion symmetry by
a trap potential induces a spin-triplet Cooper-pair amplitude in an $s$-wave
superfluid Fermi gas. Being based on symmetry considerations, we clarify that
this phenomenon may occur, when a spin rotation symmetry of the system is also
broken. We also numerically confirm that a triplet pair amplitude is really
induced under this condition, using a simple model. Our results imply that this
phenomenon is already present in a trapped $s$-wave superfluid Fermi gas with
spin imbalance. As an interesting application of this phenomenon, we point out
that one may produce a $p$-wave superfluid Fermi gas, by suddenly changing the
$s$-wave pairing interaction to a $p$-wave one by using the Feshbach resonance
technique. Since a Cooper pair is usually classified into the spin-singlet (and
even-parity) state and the spin-triplet (and odd-parity) state, our results
would be useful in considering how to mix them with each other in a superfluid
Fermi gas. Such admixture has recently attracted much attention in the field of
non-centrosymmetric superconductivity, so that our results would also
contribute to the further development of this research field, on the viewpoint
of cold Fermi gas physics.

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The categories of this paper are: stat
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The categories of this paper are: eess
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg