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arXiv 2107.00792math.AP
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$H^{s} (\mathbb R^{n})$中非齐次非线性薛定谔方程的小数据整体适定性和散射

Small data global well--posedness and scattering for the inhomogeneous nonlinear Schrödinger equation in $H^{s} (\mathbb R^{n})$

JinMyong An, JinMyong Kim

摘要:

考虑非齐次非线性薛定谔方程\[iu_{t} +Δu=|x|^{-b} f\left(u\right), u\left(0\right)=u_{0} \in H^{s} (\mathbb R^{n}),\]的Cauchy问题,其中$0<s<\min \left\{n,\;\frac{n}{2} +1\right\}$,$0<b<\min \left\{2,\;n-s,{\rm \; 1}+\frac{n-2s}{2} \right\}$和$f\left(u\right)$是一个非线性函数,其行为类似于$λ\left|u\right|^{σ} u$,具有$λ\in \mathbb C$和$σ>0$ .本文证明了当初始数据足够小时,INLS方程的Cauchy问题在$H^{s} (\mathbb R^{n})$和$σ_{0} <σ<σ_{s} $中是整体适定的,其中$σ_{0} =\frac{4-2b}{n} $和$σ_{s} =\frac{4-2b}{n-2s} $若$s<\frac{n}{2} $,$σ_{s} =\infty $若$s\ge \frac{n}{2} $ .我们的整体适定性结果改进了Guzmán在(Nonlinear Anal. Real World Appl.37:249- 286,2017)通过延长$s$和$b$的有效性。此外,我们也有小数据的散射结果。

英文摘要:

We consider the Cauchy problem for the inhomogeneous nonlinear Schrödinger (INLS) equation \[iu_{t} +Δu=|x|^{-b} f\left(u\right), u\left(0\right)=u_{0} \in H^{s} (\mathbb R^{n}),\] where $0<s<\min \left\{n,\;\frac{n}{2} +1\right\}$, $0<b<\min \left\{2,\;n-s,{\rm \; 1}+\frac{n-2s}{2} \right\}$ and $f\left(u\right)$ is a nonlinear function that behaves like $λ\left|u\right|^{σ} u$ with $λ\in \mathbb C$ and $σ>0$. We prove that the Cauchy problem of the INLS equation is globally well--posed in $H^{s} (\mathbb R^{n})$ if the initial data is sufficiently small and $σ_{0} <σ<σ_{s} $, where $σ_{0} =\frac{4-2b}{n} $ and $σ_{s} =\frac{4-2b}{n-2s} $ if $s<\frac{n}{2} $; $σ_{s} =\infty $ if $s\ge \frac{n}{2} $. Our global well--posedness result improves the one of Guzmán in (Nonlinear Anal. Real World Appl. 37: 249--286, 2017) by extending the validity of $s$ and $b$. In addition, we also have the small data scattering result.

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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