中国物理B ›› 2009, Vol. 18 ›› Issue (9): 3736-3741.doi: 10.1088/1674-1056/18/9/021
杨如曙, 姚春梅, 陈日新
Yang Ru-Shu(杨如曙)†, Yao Chun-Mei(姚春梅), and Chen Ri-Xin(陈日新)
摘要: This paper presents a family of soliton solutions of the one-dimensional nonlinear Schr?dinger equation which describes the dynamics of the dark solitons in Bose--Einstein condensates with an arbitrary x-dependent external potential. The obtained results show that the external potential has an important effect on the dark soliton dynamical characteristics of the condensates. The amplitude, width, and velocity of the output soliton are relative to the source position of the external potential. The smaller the amplitude of the soliton is, the narrower its width is, and the slower the soliton propagates. The collision of two dark solitons is nearly elastic.
中图分类号: (Solitons)