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.
4 pages, 4 figures
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- Spinor Bose-Einstein condensate flow past an obstacle
- Incoherence of Bose-Einstein condensates at supersonic speeds due to quantum noise
- Ultracold bosonic scattering dynamics off a repulsive barrier: coherence loss at the dimensional crossover
- Dissipative Transport of Trapped Bose-Einstein Condensates through Disorder
- Critical velocity for superfluidity in the one-dimensional mean-field regime: From matter to light quantum fluids
- Full distribution of the superfluid fraction and extreme value statistics in a one dimensional disordered Bose gas
- Anomalous minimization for critical velocity of superflow along a step potential
- Paraxial fluid of light in hot atomic vapors