Bright solitons in coupled defocusing NLS equation supported by coupling: Application to Bose-Einstein condensation
arXiv:cond-mat/0506444 · doi:10.1016/j.physleta.2005.07.044
Abstract
We demonstrate the formation of bright solitons in coupled defocusing nonlinear Schroedinger (NLS) equation supported by attractive coupling. As an application we use a time-dependent dynamical mean-field model to study the formation of stable bright solitons in two-component repulsive Bose-Einstein condensates (BECs) supported by interspecies attraction in a quasi one-dimensional geometry. When all interactions are repulsive, there cannot be bright solitons. However, bright solitons can be formed in two-component repulsive BECs for a sufficiently attractive interspecies interaction, which induces an attractive effective interaction among bosons of same type.
arXiv comment5 pages, 5 PS figures
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