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arXiv 2102.11178math.AP
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具有compactness性质的非线性阻尼Klein-Gordon方程解的渐近性

Asymptotics of solutions with a compactness property for the nonlinear damped Klein-Gordon equation

Raphaël Côte, Xu Yuan

摘要:

考虑具有$α>0$,$2 \le N\le 5$和能量次临界指数$p>2$的非线性阻尼Klein-Gordon方程\[ \partial_{tt}u+2α\partial_{t}u-Δu+u-|u|^{p-1}u=0 \quad \text{on} \ \ [0,\infty)\times \mathbb{R}^N \].我们研究的解决方案,它是假设只有一个非线性对象出现渐近大的时间,至少是一个序列的时间。我们首先证明了非线性对象必然是一个束缚态。其次,我们证明了当非线性对象是一个非简并态或简并激发态满足一个简单性条件时,收敛性对所有正时间成立,分别以指数或代数速度。最后,我们提供了一个例子,解决方案的收敛速度$t^{-1}$的激发态。

英文摘要:

We consider the nonlinear damped Klein-Gordon equation \[ \partial_{tt}u+2α\partial_{t}u-Δu+u-|u|^{p-1}u=0 \quad \text{on} \ \ [0,\infty)\times \mathbb{R}^N \] with $α>0$, $2 \le N\le 5$ and energy subcritical exponents $p>2$. We study the behavior of solutions for which it is supposed that only one nonlinear object appears asymptotically for large times, at least for a sequence of times. We first prove that the nonlinear object is necessarily a bound state. Next, we show that when the nonlinear object is a non-degenerate state or a degenerate excited state satisfying a simplicity condition, the convergence holds for all positive times, with an exponential or algebraic rate respectively. Last, we provide an example where the solution converges exactly at the rate $t^{-1}$ to the excited state.

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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