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  • Title: Nonequilibrium effects of anisotropic compression applied to vortex lattices in bose-einstein condensates.
    Author: Engels P, Coddington I, Haljan PC, Cornell EA.
    Journal: Phys Rev Lett; 2002 Sep 02; 89(10):100403. PubMed ID: 12225177.
    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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