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arXiv 0704.1601nlin.PS
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双通道势阱中孤子的自发对称性破缺

Spontaneous symmetry breaking of solitons trapped in a double-channel potential

M. Matuszewski, B. A. Malomed, M. Trippenbach

摘要:

本文考虑一个具有自聚焦非线性项和准一维双通道势的二维非线性薛定谔方程,一个简单的二维扩展的著名的双阱势。该模型可用非线性光学和玻色-爱因斯坦凝聚体来实现。变分近似(VA)预测的分叉打破对称性的二维孤子被困在双通道,分叉的亚临界类型。数值模拟证实了VA的预测。本文首次给出了任意双核系统中二维孤子的自发对称性破缺(SSB)。

英文摘要:

We consider a two-dimensional (2D) nonlinear Schrodinger equation with self-focusing nonlinearity and a quasi-1D double-channel potential, i.e., a straightforward 2D extension of the well-known double-well potential. The model may be realized in terms of nonlinear optics and Bose-Einstein condensates. The variational approximation (VA) predicts a bifurcation breaking the symmetry of 2D solitons trapped in the double channel, the bifurcation being of the subcritical type. The predictions of the VA are confirmed by numerical simulations. The work presents the first example of the spontaneous symmetry breaking (SSB) of 2D solitons in any dual-core system.

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