Phys. Rev. A 70, 053617 (2004) [4 pages]Dynamics of a Bose-Einstein-condensate bright soliton in an expulsive potentialReceived 6 August 2004; published 22 November 2004 We theoretically investigate the dynamics of a matter-wave soliton created in a harmonic potential, which is attractive in the transverse direction but expulsive in the longitudinal direction. This Bose-Einstein-condensate (BEC) bright soliton made of 7Li atoms has been observed in a recent experiment [ Khaykovich et al. Science 296 1290 (2002)]. We show that the nonpolynomial Schrödinger equation, an effective one-dimensional equation we derived from the three-dimensional Gross-Pitaevskii equation, is able to reproduce the main experimental features of this BEC soliton in an expulsive potential. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.70.053617
DOI:
10.1103/PhysRevA.70.053617
PACS:
03.75.Lm, 05.45.Yv
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