Impurity-induced localization of Bose-Einstein condensates in one-dimensional optical lattices

doi:10.1088/1674-1056/20/8/080308

Abstract The impurity-induced localization of two-component Bose—Einstein condensates loaded into deep one-dimensional optical lattices is studied both analytically and numerically. It is shown that, the analytical criteria for self-trapping and moving soliton/breather of the primary-component condensate are modified significantly by an admixture of an impurity component (the second component). The realization of the self-trapped state and the moving soliton/breather states of the primary-component becomes more easy with the minor admixture of the impurity-component, even if the two components are partly overlapped.

Keywords: two-component optical lattices self-trapping moving soliton/breather

Received: 25 January 2011
Revised: 29 March 2011
Accepted manuscript online:

PACS:	03.75.Kk	(Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)
	03.75.Mn	(Multicomponent condensates; spinor condensates)
	03.75.Lm	(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10774120 and 10975114), the Natural Science Foundation of Gansu Province of China (Grant No. 1010RJZA012), and the Natural Science Foundation of Northwest Normal University of China (Grant No. NWNU-KJCXGC-03-48).

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Wang Jian-Jun(王建军), Zhang Ai-Xia(张爱霞), and Xue Ju-Kui(薛具奎) Impurity-induced localization of Bose-Einstein condensates in one-dimensional optical lattices 2011 Chin. Phys. B 20 080308

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Impurity-induced localization of Bose-Einstein condensates in one-dimensional optical lattices

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