Nonequilibrium effects of anisotropic compression applied to vortex lattices in Bose-Einstein condensates
Condensed Matter
2009-02-20 v1
Abstract
We have studied the dynamics of large vortex lattices in a dilute-gas Bose-Einstein condensate. While undisturbed lattices have a regular hexagonal structure, large-amplitude quadrupolar shape oscillations of the condensate are shown to induce a wealth of nonequilibrium lattice dynamics. When exciting an m = -2 mode, we observe shifting of lattice planes, changes of lattice structure, and sheet-like structures in which individual vortices appear to have merged. Excitation of an m = +2 mode dissolves the regular lattice, leading to randomly arranged but still strictly parallel vortex lines.
Keywords
Cite
@article{arxiv.cond-mat/0204449,
title = {Nonequilibrium effects of anisotropic compression applied to vortex lattices in Bose-Einstein condensates},
author = {P. Engels and I. Coddington and P. C. Haljan and E. A. Cornell},
journal= {arXiv preprint arXiv:cond-mat/0204449},
year = {2009}
}
Comments
5 pages, 6 figures