Instabilities of wave function monopoles in Bose-Einstein condensates

Details Instabilities of wave function monopoles in Bose-Einstein condensates Instabilities of wave function monopoles in Bose-Einstein condensates

1998-11-11

arxiv.org/abs/cond-mat/9811147v1

Physics

Condensed Matter

4 pages, 9 figures (compressed figures become legible when zoomed or when paper is actually printed)

Scientific paper

10.1103/PhysRevA.60.R2669

We present analytic and numerical results for a class of monopole solutions to the two-component Gross-Pitaevski equation for a two-species Bose condensate in an effectively two-dimensional trap. We exhibit dynamical instabilities involving vortex production as one species pours through another, from which we conclude that the sub-optical sharpness of potentials exerted by matter waves makes condensates ideal tools for manipulating condensates. We also show that there are two equally valid but drastically different hydrodynamic descriptions of a two-component condensate, and illustrate how different phenomena may appear simpler in each.

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