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

Lookup NU author(s): Dr Eniko Madarassy

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Abstract

This paper suggests a method to create dark soliton-like waves in a trapped atomic Bose-Einstein condensate (BEC). With the phase imprinting method, a solitonlike disturbance is produced along the x-axis. The method is used in two cases (with and without rotation of a trapping potential). The disturbance in a two-dimensional (2D) 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 2D Gross-Pitaevskii equation (2D GPE). The successive dynamics of the wave function are studied by monitoring the evolution of density and phase profile.

Publication metadata

Author(s): Madarassy E

Publication type: Article

Publication status: Published

Journal: Romanian Journal in Physics

Year: 2010

Volume: 55

Issue: 3-4

Pages: 249-258

Print publication date: 01/01/2010

ISSN (print): 1221-146X

ISSN (electronic):

Publisher: Romanian Academy

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