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arXiv 1011.2192math.APmath-phmath.MPnlin.PS
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非线性Schr dinger/ Gross-Pitaevskii方程的质量均分

Equipartition of Mass in Nonlinear Schrödinger / Gross-Pitaevskii Equations

Zhou Gang, Michael I. Weinstein

摘要:

研究了一类非线性Schrödinger / Gross-Pitaevskii方程的无穷时间动力学.在前一篇文章中,我们证明了在一般情况下非线性基态的渐近稳定性,这种情况允许任意有限重数的退化中性模,这是对称系统中的一种典型情况。中性模式对应于关于临界点的哈密顿偏微分方程的线性化的纯虚(中性稳定)点谱。特别是,一个小的扰动的非线性基态,这通常激发这样的中性模式和辐射,将演变成一个渐进的非线性基态孤子加上衰减的中性模式加上衰减的辐射。在这篇文章中,我们给出了一个更详细的,事实上是定量的,渐近演化的图片。具体来说,我们证明了均分律:出现的渐近孤子的质量等于初始孤子质量加上初始扰动中性模中所含质量的一半。

英文摘要:

We study the infinite time dynamics of a class of nonlinear Schrödinger / Gross-Pitaevskii equations. In our previous paper, we prove the asymptotic stability of the nonlinear ground state in a general situation which admits degenerate neutral modes of arbitrary finite multiplicity, a typical situation in systems with symmetry. Neutral modes correspond to purely imaginary (neutrally stable) point spectrum of the linearization of the Hamiltonian PDE about a critical point. In particular, a small perturbation of the nonlinear ground state, which typically excites such neutral modes and radiation, will evolve toward an asymptotic nonlinear ground state soliton plus decaying neutral modes plus decaying radiation. In the present article, we give a much more detailed, in fact quantitative, picture of the asymptotic evolution. Specificially we prove an equipartition law: The asymptotic soliton which emerges has a mass which is equal to the initial soliton mass plus one half the mass contained in the initially perturbing neutral modes.

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。

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