Controlling Soliton Collisions of Condensates by Time-Dependence of Both Interactions and External Potential  

作　　者：何章明 王登龙 丁建文 颜晓红 

机构地区：[1]Department of Physics,Xiangtan University [2]College of Electronic Science Engineering,Nanjing University of Post&Telecommunication

出　　处：《Communications in Theoretical Physics》2012年第5期795-800,共6页理论物理通讯（英文版）

基　　金：Supported by National Natural Science Foundation of China under Grant Nos.51032002 and 11074212;Foundation for the Author of National Excellent Doctoral Dissertation of China under Grant No.200726;the key Project of the National HighTechnology Research and Development Program ("863" Program) of China under Grant No.2011AA050526;Hunan Provincial Innovation Foundation for Postgraduate under Grant No.CX2010B254

摘　　要：Considering time-dependence of both interactions and external potential,we analytically study the collisional behaviors of two bright solitons in Bose-Einstein condensates by using Darboux transformation.It is found that for a closed external potential,the soliton-soliton distance is decreased with nonlinearly increased interactions,while the amplitude of each soliton increases and its width decreases.For linearly increased interactions but nonlinearly decreased external potential,especially,the atom transfer between two solitons is observed,different from previous theory of no atom transfer in solitons collision in a fixed external potential.In addition,it is shown that the collisional type,such as head-on,"chase",or collision period between two solitons,can be controlled by tuning both interactions and external potential.The predicted phenomena can be observed under the condition of the current experiments and open possibilities for future application in atoms transport.

关 键 词：Bose-Einstein condensates bright solitons time-dependent interactions time-dependent external potential 

分 类 号：O469[理学—凝聚态物理]