Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collective excitations of a trapped Fermi gas at finite temperature   We study collective excitations of a trapped Fermi gas at finite temperature
using the Bogoliubov-deGennes mean-field theory in conjunction with the
generalized random phase approximation. The collective excitations are analyzed
through the density response of a monopole excitation. We show the appearance
of several modes at the normal fluid - superfluid phase transition temperature:
Higgs mode-like pairing amplitude modulations, analogues of the second sound in
the trapped gas, and an edge mode that is also the strongest mode in the
response.

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The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: physics
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The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: math
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: astro-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: hep-ex