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

P. Engels, I. Coddington, P. C. Haljan, and E. A. Cornell
Phys. Rev. Lett. 89, 100403 – Published 20 August 2002

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 sheetlike 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.

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  • Received 16 April 2002

DOI:https://doi.org/10.1103/PhysRevLett.89.100403

©2002 American Physical Society

Authors & Affiliations

P. Engels, I. Coddington, P. C. Haljan, and E. A. Cornell*

  • JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440

  • *Quantum Physics Division, National Institute of Standards and Technology.

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Issue

Vol. 89, Iss. 10 — 2 September 2002

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