Stable Skyrmions in SU(2) Gauged Bose-Einstein Condensates
Abstract
We demonstrate that the three-dimensional Skyrmion, which has remained elusive so far, spontaneously appears as the ground state of (2) symmetric Bose-Einstein condensates coupled with a non-Abelian gauge field. The gauge field is a three-dimensional analogue of the Rashba spin-orbit coupling. Upon squashing the SO(3) symmetric gauge field to one- or two-dimensional shapes, we find that the ground state continuously undergoes a change from a three-dimensional to a one- or two-dimensional Skyrmion, which is identified by estimating winding numbers and helicity. All of the emerged Skyrmions are physically understandable with the concept of the helical modulation in a unified way. These topological objects might potentially be realizable in two-component BECs experimentally.
Keywords
Cite
@article{arxiv.1204.3177,
title = {Stable Skyrmions in SU(2) Gauged Bose-Einstein Condensates},
author = {Takuto Kawakami and Takeshi Mizushima and Muneto Nitta and Kazushige Machida},
journal= {arXiv preprint arXiv:1204.3177},
year = {2012}
}
Comments
5 pages, 3 figures