中国物理B ›› 2009, Vol. 18 ›› Issue (5): 1737-1741.doi: 10.1088/1674-1056/18/5/004
颜晓红1, 王凤姣2, 丁建文2, 王登龙2
Wang Feng-Jiao(王凤姣)a), Ding Jian-Wen(丁建文)a), Yan Xiao-Hong(颜晓红)b), and Wang Deng-Long(王登龙)a)
摘要: Taking into account both gain/loss and time-dependent atomic scattering length, this paper analytically derives an exact bright solitary wave in a cigar-shaped attractive condensate in the presence of an expulsive parabolic potential. Due to the balance of the scattering length and gain/loss, the bright solitary wave is shown to have constant amplitude. Especially, it is found that the bright solitary wave is accelerated by expulsive force, whose velocity can be modulated by changing the axial and transverse angular frequencies. The results are in good agreement with the experimental observations by Khaykovich et al (2002 Science 296 1290).
中图分类号: (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)