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

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

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PUBLICATIONS

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

Published

September 1, 2002

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

Issue

No. 10

Pub Type

Journals

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 May 16, 2026)

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Created August 31, 2002, Updated October 12, 2021

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