| Motion of a Bose-Einstein Condensate Bright Soliton Incident on a Step-Like Potential |
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| 引用本文： | 程永山 龚荣洲 李宏. Motion of a Bose-Einstein Condensate Bright Soliton Incident on a Step-Like Potential[J]. 中国物理快报, 2007, 24(1): 35-38 |
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| 作者姓名： | 程永山 龚荣洲 李宏 |
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| 作者单位： | [1]Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074 [2]Hubei Key Laboratory of Bioanalytical Technique, Hubei Normal University, Huangshi 435002 |
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| 基金项目： | Supported by the Fund of Natural Science of Hubei Province under Grant No 2006ABA055, the Science and Technology Programme of Education Department of Hubei Province under Grant No Z200522001. |
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| 摘 要： |
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| 关 键 词： | 运动 冷凝物 电势 原子运动 |
| 修稿时间： | 2006-09-12 |
Motion of a Bose--Einstein Condensate Bright Soliton Incident on a Step-Like Potential |
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| CHENG Yong-Shan,GONG Rong-Zhou,LI Hong. Motion of a Bose--Einstein Condensate Bright Soliton Incident on a Step-Like Potential[J]. Chinese Physics Letters, 2007, 24(1): 35-38 |
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| Authors: | CHENG Yong-Shan GONG Rong-Zhou LI Hong |
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| Affiliation: | Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074Hubei Key Laboratory of Bioanalytical Technique, Hubei Normal University, Huangshi 435002 |
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| Abstract: | The motion characteristics of a Bose-Einstein condensate bright soliton incident on a local step-like potential barrier are investigated analytically by means of the variational approach. The dynamics of the soliton-potential interaction is studied as well. Then the results are verified by direct numerical simulations of the Gross-Pitaevskii equation. It is found that a moving bright soliton can be reflected from or pass over a step-like potentiaI in a controllable fashion, the critical velocity depends on the width of the soliton and the parameters of the step, and the motion trajectory of the soliton does not depend on its phase. The atom density envelope of the soliton is changed as the result of the interaction between the soliton and the step-like potential. |
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| Keywords: | 03.75.Lm 03.75.Kk 05.45.Yv 04.20.Fy |
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