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Nonequilibrium Effects of Anisotropic Compression Applied to Vortex Lattices in Bose-Einstein Condensates

Published

Author(s)

P Engels, Ian R. Coddington, P C. Haljan, Eric A. Cornell

Abstract

We have studied the dynamics of large vortex lattices in a dilute-gas Bose-Einstein condensate. While undisturbed lattices have a regularhexagonal structure, large-amplitude quadrupolar shape oscillations of the condensate are shown to induce a wealth of nonequilibrium latticedynamics. When exciting an m -- -2 mode, we observe shifting of lattice planes, changes of lattice structure, and sheet-like structures in whichindividual vortices appear to have merged. Excitation of an m = +2 mode dissolves the regular lattice, leading to randomly arranged but stillstrictly parallel vortex lines.
Citation
Physical Review Letters
Volume
89
Issue
No. 10

Keywords

Bose-Einstein condensation, superfluidity, vortices

Citation

Engels, P. , Coddington, I. , Haljan, P. and Cornell, E. (2002), Nonequilibrium Effects of Anisotropic Compression Applied to Vortex Lattices in Bose-Einstein Condensates, Physical Review Letters (Accessed April 21, 2024)
Created August 31, 2002, Updated October 12, 2021