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Spontaneous squeezing of a vortex in an optical lattice

J. -P. Martikainen, H. T. C. Stoof

cond-mat.stat-mecharXiv:cond-mat/0311382

Abstract

We study the equilibrium states of a vortex in a Bose-Einstein condensate in a one-dimensional optical lattice. We find that quantum effects can be important and that it is even possible for the vortex to be strongly squeezed, which reflects itself in a different quantum mechanical uncertainty of the vortex position in two orthogonal directions. The latter is observable by measuring the atomic density after an expansion of the Bose-Einstein condensate in the lattice.

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