方势阱中凝聚体的孤子动力学行为  

Soliton dynamical behavior of the condensates trapped in a square-well potential

作　　者：张波[1] 王登龙[1] 佘彦超 张蔚曦[2] 

机构地区：[1]湘潭大学物理系,湘潭411105 [2]铜仁学院物理与电子科学系,铜仁554300

出　　处：《物理学报》2013年第11期70-74,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:51032002);湖南省教育厅科研项目(批准号:12A140);贵州省自科基金(批准号:J20112219;J20122314)资助的课题~~

摘　　要：利用多重尺度法,解析地研究了方势阱中玻色-爱因斯坦凝聚体的孤子动力学行为.结果表明,方势阱对凝聚体中的孤子动力学有重要的影响.进入方势阱时孤子作加速运动,逃逸出势阱时孤子作减速运动;且随着势阱深度的增加,孤子的速度增加、幅度增加、宽度减小.这为实验操控孤子的动力学行为提供一定的参考价值.Using multiple-scale method, we study analytically the soliton dynamical behaviors of the Bose-Einstein condensates trapped in a square-well potential. It is found that the square-well potential has important effects on the soliton dynamics. When the soliton goes into the square-well potential, its movement is accelerated; while it leaves the square-well potential, the soliton is decelerated. With the increase in depth of the square-well potential, the velocity of the soliton increases, and its amplitude becomes larger and its width decreases. This may serve as a reference effect for controlling the dynamical characteristics of the soliton in experiments.

关 键 词：玻色-爱因斯坦凝聚体 孤子 方势阱 

分 类 号：O431.2[机械工程—光学工程]