Analyzing Dynamics of a Bright Soliton in Bose-Einstein Condensates with Time-Dependent Atomic Scattering Length  

作　　者：WANG Tian-Yuan ZHANG Xiao-Fei 

机构地区：[1]School of Physics and Electronics, Yunnan Nationalities University, Kunming 650031, China [2]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China [3]College of Science, Honghe University, Mengzi 661100, China

出　　处：《Communications in Theoretical Physics》2009年第7期63-67,共5页理论物理通讯（英文版）

基　　金：Supported by National Natural Science Foundation of China under Grant Nos.90406017 and 60525417;the NKBRSF of China under Grant No.2006CB921400

摘　　要：We analyze the dynamics of a bright soliton in atomic scattering length in an expulsive parabolic potential. Bose-Einstein condensates （BECs） with time-dependent Under a safe ravage of parameters in which the Gross-Pitaevskii （GP） equation is effective in one dimension, our results show that, the dynamics of the bright soliton can be classed into two phases, depending on the value of the scattering length. Meanwhile, there exists a critical value of the absolute value of the atomic scattering length, below which, the dynamics of the bright soliton is very regular. Those phenomena can be useful for developing concrete applications of the nonlinear matter waves. We also obtain the orbital equation of the bright soliton and get some interesting data which may be useful for the experimental observation of the bright soliton and the application of the atom laser with manipulated intensity.

关 键 词：Bose-Einstein condensates atomic scattering length SOLITON 

分 类 号：O412[理学—理论物理] O316[理学—物理]