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arXiv 2306.02409math.AP
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具有无界势的 Schrödinger 算子的离散含时波动方程

Discrete time-dependent wave equation for the Schrödinger operator with unbounded potential

Aparajita Dasgupta, Shyam Swarup Mondal, Michael Ruzhansky, Abhilash Tushir

AI总结:

本文研究格点上带无界非负势的离散 Schrödinger 算子的半经典波动方程,证明其纯离散谱、Cauchy 问题适定性,并在 ℏ→0 时恢复经典与极弱解。

摘要:

在本文中,我们研究格点 ℏℤⁿ 上离散 Schrödinger 算子 H_{ℏ,V}:=−ℏ⁻²L_ℏ+V 的波动方程的半经典版本,其中 L_ℏ 是离散 Laplace 算子,V 是非负乘法算子。我们证明,当势 V 满足条件 |V(k)|→∞(|k|→∞)时,H_{ℏ,V} 具有纯离散谱。我们还表明,具有正则系数的 Cauchy 问题在相应的 Sobolev 型空间中是适定的,而对于分布系数则是极弱适定的。最后,当半经典参数 ℏ→0 时,我们在某些 Sobolev 型空间中恢复了经典解以及极弱解。

英文摘要:

In this article, we investigate the semiclassical version of the wave equation for the discrete Schrödinger operator, $\mathcal{H}_{\hbar,V}:=-\hbar^{-2}\mathcal{L}_{\hbar}+V$ on the lattice $\hbar\mathbb{Z}^{n},$ where $\mathcal{L}_{\hbar}$ is the discrete Laplacian, and $V$ is a non-negative multiplication operator. We prove that $\mathcal{H}_{\hbar,V}$ has a purely discrete spectrum when the potential $V$ satisfies the condition $|V(k)|\to \infty$ as $|k|\to\infty$. We also show that the Cauchy problem with regular coefficients is well-posed in the associated Sobolev type spaces and very weakly well-posed for distributional coefficients. Finally, we recover the classical solution as well as the very weak solution in certain Sobolev type spaces as the limit of the semiclassical parameter $\hbar\to 0$.

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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