Physics – Condensed Matter – Quantum Gases
Scientific paper
2012-02-03
Physics
Condensed Matter
Quantum Gases
6 pages, 6 figures
Scientific paper
We study the dynamical properties of bright-bright solitons in two species Bose-Einstein condensates with the repulsive interspecies interactions under the external harmonic potentials by using a variational approach combined with numerical simulation. It is found that the interactions between bright-bright solitons vary from repulsive to attractive interactions with the increasing of their separating distances. And the bright-bright solitons can be localized at equilibrium positions, different from the periodic oscillation of bright soliton in the single species condensates. Especially, a through-collision is newly observed from the bright-bright solitons collisions with the increasing of the initial velocity. The collisional type of bright-bright solitons, either rebound - or through -collision, depends on the modulation of the initial conditions. These results will be helpful for the experimental manipulating such solitons.
Ding J. W.
He Zai-Min
Wang Dan-Ling
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