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arXiv 0810.1778nlin.PS
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一维离散非线性薛定谔方程小孤子的渐近稳定性

Asymptotic stability of small solitons in the discrete nonlinear Schrodinger equation in one dimension

P. G. Kevrekidis, D. E. Pelinovsky, A. Stefanov

摘要:

本文在一个离散的非线性薛定谔方程的框架下证明了一维小孤子的渐近稳定性,该方程具有离散的和高次幂律的非线性项,且外势支持一个简单的孤立本征值.分析依赖于Pelinovsky & Stefanov(2008)的色散衰减估计和Mizumachi(2008)对一维连续非线性薛定谔方程的论证。数值模拟表明,渐近稳定孤子附近的扰动的实际衰减率高于分析中使用的。

英文摘要:

Asymptotic stability of small solitons in one dimension is proved in the framework of a discrete nonlinear Schrodinger equation with septic and higher power-law nonlinearities and an external potential supporting a simple isolated eigenvalue. The analysis relies on the dispersive decay estimates from Pelinovsky & Stefanov (2008) and the arguments of Mizumachi (2008) for a continuous nonlinear Schrodinger equation in one dimension. Numerical simulations suggest that the actual decay rate of perturbations near the asymptotically stable solitons is higher than the one used in the analysis.

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