Dark soliton in one-dimensional Bose-Einstein condensate under a periodic perturbation of trap

作     者：刘超飞 胡柯 胡涛 唐翌 

作者机构：Department of PhysicsXiangtan University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2011年第20卷第1期

页      面：150-156页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：Project supported by the General Project of Hunan Provincial Educational Department of China(Grant No.07C754) the National Natural Science Foundation of China(Grant No.30570432) 

主　　题：Bose-Einstein condensate dark soliton 

摘      要：The perturbation of a confining trap leads to the collective oscillation of a Bose-Einstein condensate, thereby the propagation of a dark soliton in the condensate is affected. In this study, periodic perturbation is employed to match the soliton oscillation. We find that the soliton dynamics depends sensitively on the coupling between the moving direction of the trap and that of the soliton. The soliton energy/depth evolves periodically, and a relevant shift in the soliton trajectory occurs as compared with the unperturbed case. Overall, the soliton oscillation frequency changes little even if the perturbation amplitude and frequency vary.