Vortex Nucleation in a Stirred Bose-Einstein Condensate
软凝聚态物质
2009-11-07 v1
摘要
We studied the nucleation of vortices in a Bose-Einstein condensate stirred by a laser beam. We observed the vortex cores using time-of-flight absorption imaging. By varying the size of the stirrer, we observed either discrete resonances or a broad response as a function of the frequency of the stirrer's motion. Stirring beams small compared to the condensate size generated vortices below the critical rotation frequency for the nucleation of surface modes, suggesting a local mechanism of generation. In addition, we observed the centrifugal distortion of the condensate due to the rotating vortex lattice and found evidence for bent vortices.
引用
@article{arxiv.cond-mat/0106235,
title = {Vortex Nucleation in a Stirred Bose-Einstein Condensate},
author = {C. Raman and J. R. Abo-Shaeer and J. M. Vogels and K. Xu and W. Ketterle},
journal= {arXiv preprint arXiv:cond-mat/0106235},
year = {2009}
}