中国物理B ›› 2008, Vol. 17 ›› Issue (11): 3996-4001.doi: 10.1088/1674-1056/17/11/010

• GENERAL • 上一篇    下一篇

Nonlinear transport of Bose--Einstein condensates in a double barrier potential

方见树   

  1. Institute of Physics, Hunan University of Technology, Zhuzhou 412008, China；Department of Physics, Hunan University of Technology, Zhuzhou 412008, China
  • 收稿日期:2008-03-09 修回日期:2008-05-09 出版日期:2008-11-20 发布日期:2008-11-20
  • 基金资助:
    Project supported by the Key Research Foundation of Education Bureau of Hunan Province, China (Grant No 08A015), the Natural Science Foundation of Hunan Province, China (Grant No 06JJ2014), and the National Natural Science Foundation of China (Grant No 10575034).

Nonlinear transport of Bose--Einstein condensates in a double barrier potential

Fang Jian-Shu (方见树)   

  1. Institute of Physics, Hunan University of Technology, Zhuzhou 412008, China；Department of Physics, Hunan University of Technology, Zhuzhou 412008, China
  • Received:2008-03-09 Revised:2008-05-09 Online:2008-11-20 Published:2008-11-20
  • Supported by:
    Project supported by the Key Research Foundation of Education Bureau of Hunan Province, China (Grant No 08A015), the Natural Science Foundation of Hunan Province, China (Grant No 06JJ2014), and the National Natural Science Foundation of China (Grant No 10575034).

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摘要： The stable nonlinear transport of the Bose--Einstein condensates through a double barrier potential in a waveguide is studied. By using the direct perturbation method we have obtained a perturbed solution of Gross--Pitaevskii equation. Theoretical analysis reveals that this perturbed solution is a stable periodic solution, which shows that the transport of Bose--Einstein condensed atoms in this system is a stable nonlinear transport. The corresponding numerical results are in good agreement with the theoretical analytical results.

Abstract: The stable nonlinear transport of the Bose--Einstein condensates through a double barrier potential in a waveguide is studied. By using the direct perturbation method we have obtained a perturbed solution of Gross--Pitaevskii equation. Theoretical analysis reveals that this perturbed solution is a stable periodic solution, which shows that the transport of Bose--Einstein condensed atoms in this system is a stable nonlinear transport. The corresponding numerical results are in good agreement with the theoretical analytical results.

Key words: the nonlinear transport, Bose--Einstein condensate, perturbed solution

中图分类号:  (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)

  • 03.75.Lm
05.60.Gg (Quantum transport)