Effect of scattering lengths on the dynamics of a two-component Bose-Einstein condensate

Details Effect of scattering lengths on the dynamics of a two-component Bose-Einstein condensate Effect of scattering lengths on the dynamics of a two-component Bose-Einstein condensate

2010-09-11

arxiv.org/abs/1009.2122v1

Phys. Rev. A vol. 82, 063608 (2010)

Physics

Condensed Matter

Quantum Gases

21 pages, 10 figures

Scientific paper

10.1103/PhysRevA.82.063608

We examine the effect of the intra- and interspecies scattering lengths on the dynamics of a two-component Bose-Einstein condensate, particularly focusing on the existence and stability of solitonic excitations. For each type of possible soliton pairs stability ranges are presented in tabulated form. We also compare the numerically established stability of bright-bright, bright-dark and dark-dark solitons with our analytical prediction and with that of Painlev\'e-analysis of the dynamical equation. We demonstrate that tuning the inter-species scattering length away from the predicted value (keeping the intra-species coupling fixed) breaks the stability of the soliton pairs.

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