Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quench dynamics of a confined ultracold Fermi gas: Direct visibility of
  the Goldstone mode in the single-particle excitations   We present a numerical study of a confined ultracold Fermi gas showing that
the Goldstone mode of the BCS gap is directly visible in the dynamics of the
single-particle excitations. To this end, we investigate the low-energy dynamic
response of a confined Fermi gas to a rapid change of the scattering length
(i.e., an interaction quench). Based on a fully microscopic time-dependent
density-matrix approach within the Bogoliubov-de Gennes formalism that includes
a 3D harmonic confinement we simulate and identify the emergence of the
Goldstone mode in a cigar-shaped $^6$Li gas. We show that the quench leads to a
low-frequency in-phase oscillation of the single-particle occupations. Complete
inversion is achieved for occupations corresponding to the lowest-lying
single-particle states.

19
The categories of this paper are: eess
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an