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

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

中国物理B ›› 2011, Vol. 20 ›› Issue (8): 80308-080308.doi: 10.1088/1674-1056/20/8/080308

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

张爱霞¹, 薛具奎¹, 王建军²

(1)Key Laboratory of Atomic & Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronics Engineering, Northwest Normal University, Lanzhou 730070, China; (2)Key Laboratory of Atomic & Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronics Engineering, Northwest Normal University, Lanzhou 730070, China; Gansu Provincial Library, Lanzhou 730000, China

收稿日期:2011-01-25 修回日期:2011-03-29 出版日期:2011-08-15 发布日期:2011-08-15
基金资助:
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).

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

Wang Jian-Jun(王建军)^a)b), Zhang Ai-Xia(张爱霞)^a), and Xue Ju-Kui(薛具奎)^a)^†

^a Key Laboratory of Atomic & Molecular Physics and Functional Materials of Gansu Province, College of Physics and Electronics Engineering, Northwest Normal University, Lanzhou 730070, China; ^b Gansu Provincial Library, Lanzhou 730000, China

Received:2011-01-25 Revised:2011-03-29 Online:2011-08-15 Published:2011-08-15
Supported by:
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).

摘要/Abstract

摘要： 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.

关键词: two-component, optical lattices, self-trapping, moving soliton/breather

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.

Key words: two-component, optical lattices, self-trapping, moving soliton/breather

中图分类号: (Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)

03.75.Kk

03.75.Mn (Multicomponent condensates; spinor condensates) 03.75.Lm (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)

王建军, 张爱霞, 薛具奎. Impurity-induced localization of Bose-Einstein condensates in one-dimensional optical lattices[J]. 中国物理B, 2011, 20(8): 80308-080308.

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[J]. Chin. Phys. B, 2011, 20(8): 80308-080308.

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

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

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