Vortex molecules in coherently coupled two-component Bose-Einstein condensates
Mesoscale and Nanoscale Physics
2009-11-10 v2
Abstract
A vortex molecule is predicted in rotating two-component Bose-Einstein condensates whose internal hyperfine states are coupled coherently by an external field. A vortex in one component and that in the other are connected by a domain wall of the relative phase, constituting a "vortex molecule", which features a nonaxisymmetric (pseudo)spin texture with a pair of merons. The binding mechanism of the vortex molecule is discussed based on a generalized nonlinear sigma model and a variational ansatz. The anisotropy of vortex molecules is caused by the difference in the scattering lengths, yielding a distorted vortex-molecule lattice in fast rotating condensates.
Cite
@article{arxiv.cond-mat/0406150,
title = {Vortex molecules in coherently coupled two-component Bose-Einstein condensates},
author = {Kenichi Kasamatsu and Makoto Tsubota and Masahito Ueda},
journal= {arXiv preprint arXiv:cond-mat/0406150},
year = {2009}
}
Comments
4 pages, 4 figures, greatly revised version