Anderson-Bogoliubov collective excitations in superfluid Fermi gases at nonzero temperatures

S. N. Klimin; H. Kurkjian; J. Tempere

doi:10.1007/s10909-019-02160-3

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arXiv · 1912.03059

Anderson-Bogoliubov collective excitations in superfluid Fermi gases at nonzero temperatures

S. N. Klimin·H. Kurkjian·J. Tempere

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Abstract

The Anderson-Bogoliubov branch of collective excitations in a condensed Fermi gas is treated using the effective bosonic action of Gaussian pair fluctuations. The spectra of collective excitations are treated for finite temperature and momentum throughout the BCS-BEC crossover. The obtained spectra explain, both qualitatively and quantitatively, recent experimental results on Goldstone modes in atomic Fermi superfluids.

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S. N. Klimin, H. Kurkjian, J. Tempere. 2019-12-06. Anderson-Bogoliubov collective excitations in superfluid Fermi gases at nonzero temperatures. https://doi.org/10.1007/s10909-019-02160-3

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