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

Z. Shi, K. J.H. Law, P. G. Kevrekidis*, B. A. Malomed

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


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 bright-bright (BB) type], or of opposite signs in the two components [the gap-bright (GB) type]. 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.

Original languageEnglish
Pages (from-to)4021-4027
Number of pages7
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number22
StatePublished - 26 May 2008


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