关键词: 玻色-爱因斯坦凝聚/
孤子/
S-波散射长度
English Abstract
Controlling interactions between bright solitons in Bose-Einstein condensate
He Zhang-Ming1,Zhang Zhi-Qiang2
1.College of Science, Hunan University of Technology, Zhuzhou 412007, China;
2.Department of Basic Course, Zhengzhou College of Science and Technology, Zhengzhou 450064, China
Fund Project:Project supported by the National Nature Science Foundation of China (Grant Nos. 11447223, 11505054), the Research Foundation of Education Bureau of Hunan Province of China (Grant No. 14 C0348), the Open Project Program of State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences (Grant No. Y4KF211CJ1), and the Research Foundation of Education Bureau of Henan Province of China (Grant No. 14B140014).Received Date:04 January 2016
Accepted Date:22 February 2016
Published Online:05 June 2016
Abstract:Considering the periodically driving linear potential, we study the interactions between two solitons in Bose-Einstein condensate (BEC). By using Darboux transformation, the double bright soliton solution of Gross-Pitaevskii equation is obtained. Then we numerically calculate the properties of interaction between the two bright solitons in BEC, and obtain a critical value of the S-wave scattering length (SL). It is shown that, when the SL is more than the critical value, the attractive interaction and the atom transfer between two bright solitons can be observed. While the SL is less than the critical value, two bright solitons can keep stable and localized. Furthermore, the stable periodic oscillations of two solitons can be observed by slowly changing the potential. These results will be conducive to the BEC soliton experiments.
Keywords: Bose-Einstein condensates/
bright solitons/
S-wave scattering length
