358 research outputs found
Localization of Two-Component Bose-Einstein Condensates in Optical Lattices
We reveal underlying principles of nonlinear localization of a two-component
Bose-Einstein condensate loaded into a one-dimensional optical lattice. Our
theory shows that spin-dependent optical lattices can be used to manipulate
both the type and magnitude of nonlinear interaction between the ultracold
atomic species and to observe nontrivial two-componentnlocalized states of a
condensate in both bands and gaps of the matter-wave band-gap structure.Comment: 4 pages, 4 figure
Stability of multi-hump optical solitons
We demonstrate that, in contrast with what was previously believed,
multi-hump solitary waves can be stable. By means of linear stability analysis
and numerical simulations, we investigate the stability of two- and three-hump
solitary waves governed by incoherent beam interaction in a saturable medium,
providing a theoretical background for the experimental results reported by M.
Mitchell, M. Segev, and D. Christodoulides [Phys. Rev. Lett. v. 80, p. 4657
(1998)].Comment: 4 pages, 5 figures, to appear in PR
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