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cond-mat.quant-gas2009★ 54 cited
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…
cond-mat.quant-gas2009★ 58 cited
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…