Zero temperature damping of Bose-Einstein condensate oscillations by vortex-antivortex pair creation
arXiv:cond-mat/0301397 · doi:10.1103/PhysRevA.68.011602
Abstract
We investigate vortex-antivortex pair creation in a supersonically expanding and contracting quasi-2D Bose-Einstein condensate at zero temperature. For sufficiently large amplitude condensate oscillations, pair production provides the leading dissipation mechanism. The condensate oscillations decay in a nonexponential fashion, and the dissipation rate depends strongly on the oscillation amplitude. These features allow to distinguish the decay due to pair creation from other possible damping mechanisms. Experimental observation of the predicted oscillation behavior of the superfluid gas provides a direct confirmation of the hydrodynamical analogy of quantum electrodynamics and quantum vortex dynamics in two spatial dimensions.
arXiv comment4 pages, 2 figures; to appear in the Rapids section of Phys. Rev. A
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- Mean-field description of dynamical collapse of a fermionic condensate in a trapped boson-fermion mixture
- Decay of quantum sensitivity due to three-body loss in Bose-Einstein condensates