Collective excitations of a trapped Fermi gas at finite temperature

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Abstract

We study collective excitations of a trapped Fermi gas at finite temperature using the Bogoliubov–de Gennes 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.
Original languageEnglish
Article number013602
Pages (from-to)1-7
Number of pages7
JournalPhysical Review A
Volume89
Issue number1
DOIs
Publication statusPublished - Jan 2014
MoE publication typeA1 Journal article-refereed

Keywords

  • collective modes
  • ultracold Fermi gases

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