Dipole Oscillations of a Bose-Einstein Condensate in Presence of Defects and Disorder
arXiv:0803.4116 · doi:10.1103/PhysRevLett.100.250405
Abstract
We consider dipole oscillations of a trapped dilute Bose-Einstein condensate in the presence of a scattering potential consisting either in a localized defect or in an extended disordered potential. In both cases the breaking of superfluidity and the damping of the oscillations are shown to be related to the appearance of a nonlinear dissipative flow. At supersonic velocities the flow becomes asymptotically dissipationless.
arXiv comment4 pages, 4 figures
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