Decay of soliton-like perturbations into vortex - anti vortex pairs

Details Decay of soliton-like perturbations into vortex - anti vortex pairs Decay of soliton-like perturbations into vortex - anti vortex pairs

2008-07-24

arxiv.org/abs/0807.3893v3

Physics

Condensed Matter

Other Condensed Matter

14 pages, 16 figures. Accepted by the Romanian Journal of Physics

Scientific paper

This paper suggests a method for an experiment to create dark soliton-like waves in a trapped atomic Bose-Einstein condensate (BEC). With the phase imprinting method, a soliton-like disturbance is produced along the x-axis. The method is used in two cases (with and without rotation of an asymmetric trapping potential). The disturbance in a two-dimensional system is unstable. The soliton-like perturbation is found to decay into more stable vortex pairs together with a burst of sound wave. The simulations are performed by solving the two-dimensional Gross-Pitaevskii equation (2D GPE). The successive dynamics of the wave function are studied by monitoring the evolution of density and phase profile.

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