Nonlinear Phenomena in Complex Systems, 2006, Vol.9, No.2, pp.194-197

NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

2006, Vol.9, No.2, pp.194-197

Multi Solitons of a Bose-Einstein Condensate in a Three-Dimensional Ring.
L. Salasnich

A Bose-Einstein Condensate (BEC) made of alkali-metal atoms at ultra-low temperatures is well described by the three-dimensional cubic nonlinear Schrödinger equation, the so-called Gross-Pitaevskii equation (GPE). Here we consider an attractive BEC in a ring and by solving the GPE we predict the existence of bright solitons with single and multi-peaks, showing that they have a limited domain of dynamical stability. We also discuss finite-temperature effects on the transition from the uniform phase to the localized phase.
Key words: matter waves; solitons in Bose-Einstein condensates

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