Dynamics of a BEC bright soliton in an expulsive potential

Details Dynamics of a BEC bright soliton in an expulsive potential Dynamics of a BEC bright soliton in an expulsive potential

2004-08-07

arxiv.org/abs/cond-mat/0408165v1

Phys. Rev. A 70, 053617 (2004)

Physics

Condensed Matter

Statistical Mechanics

5 pages, 4 figures (2 of them with colors)

Scientific paper

10.1103/PhysRevA.70.053617

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 $^7$Li atoms has been observed in a recent experiment (Science {\bf 296}, 1290 (2002)). We show that the non-polynomial Schr\"odinger 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.

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