Critical Superfluid Velocity in a Trapped Dipolar Gas
نویسندگان
چکیده
منابع مشابه
Critical superfluid velocity in a trapped dipolar gas.
We investigate the superfluid properties of a dipolar Bose-Einstein condensate (BEC) in a fully three-dimensional trap. Specifically, we estimate a superfluid critical velocity for this system by applying the Landau criterion to its discrete quasiparticle spectrum. We test this critical velocity by direct numerical simulation of condensate depletion as a blue-detuned laser moves through the con...
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A. de Paz,1,2 P. Pedri,1,2 A. Sharma,1,3 M. Efremov,1,4 B. Naylor,2,1 O. Gorceix,1,2 E. Maréchal,2,1 L. Vernac,1,2 and B. Laburthe-Tolra2,1 1Université Paris 13, Sorbonne Paris Cité, Laboratoire de Physique des Lasers, F-93430 Villetaneuse, France 2CNRS, UMR 7538, LPL, F-93430 Villetaneuse, France 3Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, United Kingdom 4Inst...
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Critical velocities have been observed in an ultracold superfluid Fermi gas throughout the BEC-BCS crossover. A pronounced peak of the critical velocity at unitarity demonstrates that superfluidity is most robust for resonant atomic interactions. Critical velocities were determined from the abrupt onset of dissipation when the velocity of a moving one-dimensional optical lattice was varied. The...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2010
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.104.094501