Thermal Fluctuations of Vortex Matter in Trapped Bose-Einstein Condensates

Details Thermal Fluctuations of Vortex Matter in Trapped Bose-Einstein Condensates Thermal Fluctuations of Vortex Matter in Trapped Bose-Einstein Condensates

2006-04-18

arxiv.org/abs/cond-mat/0604416v3

Phys. Rev. Lett. 97, 170403 (2006)

Physics

Condensed Matter

Statistical Mechanics

v2: figure quality improved; v3: references added, minor extentions following referee requests

Scientific paper

10.1103/PhysRevLett.97.170403

We perform Monte Carlo studies of vortices in three dimensions in a cylindrical confinement, with uniform and nonuniform density. The former is relevant to rotating 4He, the latter is relevant to a rotating trapped Bose--Einstein condensate. In the former case we find dominant angular thermal vortex fluctuations close to the cylinder wall. For the latter case, a novel effect is that at low temperatures the vortex solid close to the center of the trap crosses directly over to a tension-less vortex tangle near the edge of the trap. At higher temperatures an intermediate tensionful vortex liquid located between the vortex solid and the vortex tangle, may exist.

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