Two-Dimensional Soliton Interaction for Multi-component Bose-Einstein Condensates

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2008,（9）
• 页码范围: 655-660
• 页数: 6页
• 语种: 英文

摘要

For two-component disk-shaped Bose-Einstein condensates with repulsive atom-atom interaction,the small amplitude,finite and long wavelength nonlinear waves can be described by a Kadomtsev-Petviashvili-Ⅰ equation at the lowest order from the original coupled Gross-Pitaevskii equations.One- and two-soliton solutions of the Kadomtsev-Petviashvili-Ⅰ equation are given,therefore,the wave functions of both atomic gases are obtained as well.The instability of a soliton under higher-order long wavelength disturbance has been investigated.It is found that the instability depends on the angle between two directions of both soliton and disturbance.