Trapping of two-component matter-wave solitons by mismatched optical lattices
arXiv:0803.3297 · doi:10.1016/j.physleta.2008.02.088
Abstract
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.
References in corpus (8)
- Symmetric and asymmetric solitons in linearly coupled Bose-Einstein condensates trapped in optical lattices
- Spontaneous soliton symmetry breaking in two-dimensional coupled Bose-Einstein condensates supported by optical lattices
- Tightly bound gap solitons in a Fermi gas
- Slow-light optical bullets in arrays of nonlinear Bragg-grating waveguides
- Symbiotic gap and semi-gap solitons in Bose-Einstein condensates
- Gap solitons in superfluid boson-fermion mixtures
- Mixed symmetry localized modes and breathers in binary mixtures of Bose-Einstein condensates in optical lattices
- Competition between attractive and repulsive interactions in two-component Bose-Einstein condensates trapped in an optical lattice