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arXiv 2108.02583math.AP
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非齐次非线性薛定谔方程解的整体存在性和散射性

Global existence and scattering for the inhomogeneous nonlinear Schrödinger equation

Lassaad Aloui, Slim Tayachi

摘要:

本文考虑非齐次非线性薛定谔方程$i\partial_t u +Δu=K(x)|u|^αu,\, u(0)=u_0\in H^s({\mathbb R}^N),\, s=0,\,1,$ $N\geq 1,$ $|K(x)|+|x|^s|\nabla^sK(x)|\lesssim |x|^{-b},$ $0<b<\min(2,N-2s),$ $0<α<{(4-2b)/(N-2s)}$ .在一个新的区间$α_0(b)<α<(4-2b)/N$上,我们在加权$L^2$ -空间中得到了振荡初值和散射理论的整体存在性的新结果。值$α_0(b)$是$Nα^2+(N-2+2b)α-4+2b=0,$的正根,它扩展了已知的$b=0$的施特劳斯指数。我们的结果改进了已知的$K(x)=μ|x|^{-b}$,$μ\in \mathbb{C}$的结果,并适用于更一般的势。特别是,我们显示的潜在的行为在原点和无穷大的$α$的允许范围的影响。一些衰减估计也建立了散焦的情况下。为了证明散射结果,我们给出了一个新的标准考虑潜在的$K$。

英文摘要:

In this paper we consider the inhomogeneous nonlinear Schrödinger equation $i\partial_t u +Δu=K(x)|u|^αu,\, u(0)=u_0\in H^s({\mathbb R}^N),\, s=0,\,1,$ $N\geq 1,$ $|K(x)|+|x|^s|\nabla^sK(x)|\lesssim |x|^{-b},$ $0<b<\min(2,N-2s),$ $0<α<{(4-2b)/(N-2s)}$. We obtain novel results of global existence for oscillating initial data and scattering theory in a weighted $L^2$-space for a new range $α_0(b)<α<(4-2b)/N$. The value $α_0(b)$ is the positive root of $Nα^2+(N-2+2b)α-4+2b=0,$ which extends the Strauss exponent known for $b=0$. Our results improve the known ones for $K(x)=μ|x|^{-b}$, $μ\in \mathbb{C}$ and apply for more general potentials. In particular, we show the impact of the behavior of the potential at the origin and infinity on the allowed range of $α$. Some decay estimates are also established for the defocusing case. To prove the scattering results, we give a new criterion taking into account the potential $K$.

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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