Dynamics of Bose–Einstein condensate in a harmonic potential and a Gaussian energy barrier

doi:10.1088/1674-1056/20/1/010311

中国物理B ›› 2011, Vol. 20 ›› Issue (1): 10311-010311.doi: 10.1088/1674-1056/20/1/010311

Dynamics of Bose–Einstein condensate in a harmonic potential and a Gaussian energy barrier

花巍, 李彬, 刘学深

Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China

收稿日期:2010-04-12 修回日期:2010-07-30 出版日期:2011-01-15 发布日期:2011-01-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10974068).

Dynamics of Bose–Einstein condensate in a harmonic potential and a Gaussian energy barrier

Hua Wei(花巍), Li Bin(李彬), and Liu Xue-Shen(刘学深)^†

Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China

Received:2010-04-12 Revised:2010-07-30 Online:2011-01-15 Published:2011-01-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10974068).

摘要/Abstract

摘要： We have studied the dynamics of Bose–Einstein condensate by solving numerically the Gross-Pitaevskii (GP) equation. We examined the periodic behaviour of the condensate in a shifted harmonic potential, and further demonstrated the tunneling effect of a condensate through a Gaussian energy barrier, which is inserted after the condensate has been excited by shifting the harmonic trapping potential to a side. Moreover, it is shown that the initial condensate evolves dynamically into two separate moving condensates after the tunneling time under certain conditions.

Abstract: We have studied the dynamics of Bose–Einstein condensate by solving numerically the Gross-Pitaevskii (GP) equation. We examined the periodic behaviour of the condensate in a shifted harmonic potential, and further demonstrated the tunneling effect of a condensate through a Gaussian energy barrier, which is inserted after the condensate has been excited by shifting the harmonic trapping potential to a side. Moreover, it is shown that the initial condensate evolves dynamically into two separate moving condensates after the tunneling time under certain conditions.

Key words: Gross–Pitaevskii equation, Gaussian energy barrier, tunneling effect

中图分类号: (Other Bose-Einstein condensation phenomena)

03.75.Nt

花巍, 李彬, 刘学深. Dynamics of Bose–Einstein condensate in a harmonic potential and a Gaussian energy barrier[J]. 中国物理B, 2011, 20(1): 10311-010311.

Hua Wei(花巍), Li Bin(李彬), and Liu Xue-Shen(刘学深). Dynamics of Bose–Einstein condensate in a harmonic potential and a Gaussian energy barrier[J]. Chin. Phys. B, 2011, 20(1): 10311-010311.

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Dynamics of Bose–Einstein condensate in a harmonic potential and a Gaussian energy barrier

Dynamics of Bose–Einstein condensate in a harmonic potential and a Gaussian energy barrier

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