Thermal Fluctuations of Vortex Matter in Trapped Bose-Einstein Condensates
Abstract
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.
Keywords
Cite
@article{arxiv.cond-mat/0604416,
title = {Thermal Fluctuations of Vortex Matter in Trapped Bose-Einstein Condensates},
author = {S. Kragset and E. Babaev and A. Sudbo},
journal= {arXiv preprint arXiv:cond-mat/0604416},
year = {2007}
}
Comments
v2: figure quality improved; v3: references added, minor extentions following referee requests