Instabilities of off-centered vortices in a Bose-Einstein condensate
Soft Condensed Matter
2009-11-07 v3
Abstract
We study numerically the excitations of off-centered vortices in a Bose-Einstein condensate. The displacement of a single vortex and the separation of a doubly quantized vortex are considered. We find that the core-localized excitations of the precessing vortices continue to feature the property which implies that the vortices are unstable. The core-localized, dipolar, and quadrupolar excitations are found to deform continuously as functions of vortex displacements and intervortex separation.
Keywords
Cite
@article{arxiv.cond-mat/0212528,
title = {Instabilities of off-centered vortices in a Bose-Einstein condensate},
author = {Tomoya Isoshima and Jukka Huhtamäki and Martti M. Salomaa},
journal= {arXiv preprint arXiv:cond-mat/0212528},
year = {2009}
}
Comments
8 pages, 9 figures. Introduction and Conclusion are fully revised. Definitions of angular momenta and usage of the time-dependent Bogoliubov Eqs. are newly clarified