Trapping of two-component matter-wave solitons by mismatched optical lattices

Details Trapping of two-component matter-wave solitons by mismatched optical lattices Trapping of two-component matter-wave solitons by mismatched optical lattices

2008-03-22

arxiv.org/abs/0803.3297v1

Nonlinear Sciences

Pattern Formation and Solitons

Scientific paper

10.1016/j.physleta.2008.02.088

We consider a one-dimensional model of a two-component Bose-Einstein condensate in the presence of periodic external potentials of opposite signs, acting on the two species. The interaction between the species is attractive, while intra-species interactions may be attractive too [the system of the right-bright (BB) type], or of opposite signs in the two components [the gap-bright (GB) model]. We identify the existence and stability domains for soliton complexes of the BB and GB types. The evolution of unstable solitons leads to the establishment of oscillatory states. The increase of the strength of the nonlinear attraction between the species results in symbiotic stabilization of the complexes, despite the fact that one component is centered around a local maximum of the respective periodic potential.

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