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Switching and Self-Trapping of Two Coupled Bose–Einstein Condensates in Trap Potentials with a Localized Impurity

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Abstract

Stationary states of two coupled Bose-Einstein condensates (BECs) in trap potentials with a localized impurity are obtained by the variational approach, and effects of the impurity on the stationary states and the characteristics of the two coupled BECs are discussed by performing a standard linear stability analysis. The switching and self-trapping of the two coupled BECs strictly depends on the impurity, and the critical impurity strength value are given for initial in-phase and out-of-phase cases. Finally, the atom population transferring ratio of the two coupled BECs is introduced, and the Josephson oscillations of the population transfer are discussed as time changes.

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Authors and Affiliations

  1. Department of Optoelectronic Engineering Huazhong, University of Science and Technology, Wuhan, 430074, P. R. China

    Hong Li & Dexiu Huang

  2. Department of Physics, Hubei Normal University, Huangshi, 435002, P. R. China

    Hong Li & Yongshan Cheng

Authors
  1. Hong Li
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  2. Yongshan Cheng
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  3. Dexiu Huang
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Correspondence to Hong Li.

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Li, H., Cheng, Y. & Huang, D. Switching and Self-Trapping of Two Coupled Bose–Einstein Condensates in Trap Potentials with a Localized Impurity. J Low Temp Phys 140, 11–27 (2005). https://doi.org/10.1007/s10909-005-6009-2

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  • DOI: https://doi.org/10.1007/s10909-005-6009-2

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