Collective excitations of a trapped Fermi gas at finite temperature
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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2014-01
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Language
en
Pages
7
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Physical Review A, Volume 89, issue 1, pp. 1-7
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.Description
Keywords
collective modes, ultracold Fermi gases
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Citation
Korolyuk, A, Kinnunen, J J & Törmä, P 2014, ' Collective excitations of a trapped Fermi gas at finite temperature ', Physical Review A, vol. 89, no. 1, 013602, pp. 1-7 . https://doi.org/10.1103/PhysRevA.89.013602