Diffusive instability of a vortex in a rotating Bose gas

Details Diffusive instability of a vortex in a rotating Bose gas Diffusive instability of a vortex in a rotating Bose gas

2005-09-23

arxiv.org/abs/cond-mat/0509592v1

Physics

Condensed Matter

Statistical Mechanics

13 pages, 5 figures

Scientific paper

The dissipative dynamics of a vortex in a finite temperature trapped Bose-Einstein condensate are shown to be governed by a {\em diffusive instability}. In the weakly interacting regime we find a cross-over from instability to metastability of the vortex, determined only by the relative rotation rate of the vortex and thermal cloud. Even in the thermodynamically stable regime there is a finite lifetime arising from diffusive instability. We find the mean exit time for the vortex from the condensate, and show that near the critical frequency for thermodynamic stability the lifetime has a universal form which is independent of the condensate size and the vortex precession frequency. In the thermodynamically stable regime the steady-state two-time position correlation predicts `thermal bunching', giving an increased probability of positional coincidence for short times.

Affiliated with

Also associated with

No associations

Rating

Diffusive instability of a vortex in a rotating Bose gas does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Diffusive instability of a vortex in a rotating Bose gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diffusive instability of a vortex in a rotating Bose gas will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-72126