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Effects of periodic potentials on the critical velocity of superfluid Fermi gases in the BCS-BEC crossover
Gentaro Watanabe, Franco Dalfovo, Lev P. Pitaevskii +1
We study the effects of an external periodic potential on the critical velocity of a superfluid Fermi gas in the crossover between the Bardeen-Cooper-Schrieffer (BCS) phase and Bos…
Critical velocity of superfluid flow through single barrier and periodic potentials
Gentaro Watanabe, F. Dalfovo, F. Piazza +2
We investigate the problem of an ultracold atomic gas in the superfluid phase flowing in the presence of a potential barrier or a periodic potential. We use a hydrodynamic scheme i…
First and second sound in a strongly interacting Fermi gas
E. Taylor, H. Hu, X. -J. Liu +3
Using a variational approach, we solve the equations of two-fluid hydrodynamics for a uniform and trapped Fermi gas at unitarity. In the uniform case, we find that the first and se…