Nonlinear transport of Bose--Einstein condensates in a double barrier potential
Fang Jian-Shu (方见树)
Institute of Physics, Hunan University of Technology, Zhuzhou 412008, China；Department of Physics, Hunan University of Technology, Zhuzhou 412008, China
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.
Received: 09 March 2008
Revised: 09 May 2008
Accepted manuscript online:
PACS:
03.75.Lm
(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
Fund: 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).
Cite this article:
Fang Jian-Shu (方见树) Nonlinear transport of Bose--Einstein condensates in a double barrier potential 2008 Chin. Phys. B 17 3996
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