arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0705.1016cond-mat.other
收藏

抛物势场中暗孤子的周期振荡

Periodic oscillations of dark solitons in parabolic potentials

D. E. Pelinovsky, P. G. Kevrekidis

摘要:

利用Hermite函数的基,将具有抛物型外势的Gross-Pitaevskii方程转化为离散动力系统。我们考虑小振幅稳态解与一个单一的节点,称为暗孤子,并检查它们的存在性和线性稳定性。此外,我们证明了在这样的解决方案的邻域中的周期运动的持久性。我们的结果证实了数值计算阐明相关解决方案的存在性,线性稳定性和动力学。

英文摘要:

We reformulate the Gross-Pitaevskii equation with an external parabolic potential as a discrete dynamical system, by using the basis of Hermite functions. We consider small amplitude stationary solutions with a single node, called dark solitons, and examine their existence and linear stability. Furthermore, we prove the persistence of a periodic motion in a neighborhood of such solutions. Our results are corroborated by numerical computations elucidating the existence, linear stability and dynamics of the relevant solutions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑