| Effect of a localized impurity on soliton dynamics in the Bose-Einstein condensates |
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| 作者姓名： | 杨如曙 姚春梅 伍宗富 |
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| 作者单位： | Department of Electric Engineering,Hunan University of Arts and Science |
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| 基金项目： | Project supported by the Natural Science Foundation of Hunan Province of China (Grant No. 07JJ3002), the Fund of the 11th Five-year Plan for Key Construction Academic Subject (Optics) of Hunan Province of China, and the Scientific Research Foundation of the Science and Technology Bureau of Hunan Province of China (Grant No. GK3059). |
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| 摘 要： | By using a multiple-scale method,we analytically study the effect of a localized impurity on the soliton dynamics in the Bose-Einstein condensates.It is shown that a dark soliton can be transmitted through a repulsive (or attractive) impurity,while at the position of the localized impurity the soliton can be quasitrapped by the impurity.Additionally,we find that the strength of the localized impurity has an important effect on the dark soliton dynamics.With increasing strength of the localized impurity,the amplitude of the dark soliton becomes bigger,while its width is narrower,and the soliton propagates slower.
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| 关 键 词： | Bose-Einstein condensates solitons localized impurity |
| 收稿时间： | 2010-06-12 |
Effect of a localized impurity on soliton dynamics in the Bose–Einstein condensates |
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| Yang Ru-Shu,Yao Chun-Mei and Wu Zong-Fu.Effect of a localized impurity on soliton dynamics in the Bose-Einstein condensates[J].Chinese Physics B,2011,20(2):20502-020502. |
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| Authors: | Yang Ru-Shu Yao Chun-Mei and Wu Zong-Fu |
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| Institution: | Department of Electric Engineering, Hunan University of Arts and Science, Changde 415000, China;Department of Electric Engineering, Hunan University of Arts and Science, Changde 415000, China;Department of Electric Engineering, Hunan University of Arts and Science, Changde 415000, China |
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| Abstract: | By using a multiple-scale method, we analytically study the effect of a localized impurity on the soliton dynamics in the Bose--Einstein condensates. It is shown that a dark soliton can be transmitted through a repulsive (or attractive) impurity, while at the position of the localized impurity the soliton can be quasitrapped by the impurity. Additionally, we find that the strength of the localized impurity has an important effect on the dark soliton dynamics. With increasing strength of the localized impurity, the amplitude of the dark soliton becomes bigger, while its width is narrower, and the soliton propagates slower. |
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| Keywords: | Bose--Einstein condensates solitons localized impurity |
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