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arXiv 2103.10458math.APmath.DSnlin.PS
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Ginzburg-Landau方程中临界波前局部扰动的急剧衰减率

Sharp decay rates for localized perturbations to the critical front in the Ginzburg-Landau equation

Montie Avery, Arnd Scheel

摘要:

本文重新讨论了Ginzburg-Landau方程临界侵入锋的非线性稳定性。我们的主要结果表明,局域扰动的振幅衰减率$t^{-3/2}$,而相位衰减扩散。因此,我们完善了早期的工作Bricmont和Kupiainen以及Eckmann和Wayne,他们分别建立了非线性稳定性,但衰减速率较慢。在技术层面上,我们依赖于尖锐的线性估计,通过分析的预解函数附近的本质谱通过远场/核心分解,这是非常适合于准确地描述单独的中性稳定模式所产生的远场行为的动态的左边和右边。

英文摘要:

We revisit the nonlinear stability of the critical invasion front in the Ginzburg-Landau equation. Our main result shows that the amplitude of localized perturbations decays with rate $t^{-3/2}$, while the phase decays diffusively. We thereby refine earlier work of Bricmont and Kupiainen as well as Eckmann and Wayne, who separately established nonlinear stability but with slower decay rates. On a technical level, we rely on sharp linear estimates obtained through analysis of the resolvent near the essential spectrum via a far-field/core decomposition which is well suited to accurately describing the dynamics of separate neutrally stable modes arising from far-field behavior on the left and right.

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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