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 language | English |
|---|---|
| Article number | 013602 |
| Pages (from-to) | 1-7 |
| Number of pages | 7 |
| Journal | Physical Review A |
| Volume | 89 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 2014 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- collective modes
- ultracold Fermi gases
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