Dipole Oscillations of a Bose-Einstein Condensate in Presence of Defects and Disorder

Details Dipole Oscillations of a Bose-Einstein Condensate in Presence of Defects and Disorder Dipole Oscillations of a Bose-Einstein Condensate in Presence of Defects and Disorder

2008-03-28

arxiv.org/abs/0803.4116v1

Phys. Rev. Lett. 100, 250405 (2008)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.100.250405

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.

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