Stability of two-dimensional, controlled, Bose-Einstein coherent states

D. Jovanović () and R. Fedele

The European Physical Journal B: Condensed Matter and Complex Systems, 2007, vol. 60, issue 3, 363-368

Abstract: Two-dimensional stability of a controlled Bose-Einstein condensation state, in the form of a nonlinear Schrödinger soliton [JETP Lett. 80 535 (2004)], is studied for the condensations with both repulsive and attractive inter-atom interactions. The Gross-Pitaevski equation is solved numerically, taking initialy a controlled soliton whose “effective mass” is several times bigger than the critical value for a weak collapse in the absence of a potential well, and allowing for reasonably large errors in the experimental realization of the trapping potential required by the theory. For repulsive and sufficiently weak attractive interactions, the controlled state is shown to remain stable inside a breathing potential well, for a time that is an order of magnitude longer than the characteristic periods of the forced and eigenoscillations of the soliton. The collapse is observed only for attractive interactions, when the nonlinear attraction exceeded the appropriate threshold. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Keywords: 03.75.Lm Tunneling; Josephson effect; Bose-Einstein condensates in periodic potentials; solitons; vortices; and topological excitations; 05.45.Yv Solitons; 05.30.Jp Boson systems (search for similar items in EconPapers)
Date: 2007
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DOI: 10.1140/epjb/e2007-00361-6

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