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• W4239432860 abstract "Using a variational approach, we present the full solutions of the simplified one-dimensional two-fluid hydrodynamic equations for a unitary Fermi gas trapped in a highly elongated harmonic potential, which was recently derived by G. Bertaina and coworkers [Phys. Rev. Lett. 105, 150402 (2010)]. We calculate the discretized mode frequencies of first and second sound along the weak axial trapping potential, as a function of the temperature and the form of superfluid density. We show that the density fluctuations in second-sound modes, due to their coupling to first-sound modes, are large enough to be measured in current experimental setups such as that exploited by M. K. Tey et al. at the University of Innsbruck [Phys. Rev. Lett. 110, 055303 (2013)]. Owing to the sensitivity of second sounds on the form of superfluid density, the high precision of the measured second-sound frequencies may provide us a promising way to accurately determine the superfluid density of a unitary Fermi gas, which so far has remained elusive." @default.
• W4239432860 created "2022-05-12" @default.
• W4239432860 creator A5065101788 @default.
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• W4239432860 date "2014-08-11" @default.
• W4239432860 modified "2023-10-16" @default.
• W4239432860 title "First and second sound of a unitary Fermi gas in highly elongated harmonic traps" @default.
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• W4239432860 doi "https://doi.org/10.1103/physreva.90.023616" @default.
• W4239432860 hasPublicationYear "2014" @default.
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