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arXiv 2409.03027math.AP
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具有复势的薛定谔算子波动方程的非调和分析

Non-harmonic analysis of the wave equation for Schrödinger operators with complex potential

Aparajita Dasgupta, Lalit Mohan, Shyam Swarup Mondal

AI总结:

本文研究具有复势的薛定谔算子波动方程,证明了算子谱的离散性以及柯西问题在 Sobolev 空间、Gevrey 空间和分布奇异性情形下的适定性。

摘要:

本文研究 $\"mathbb{R}^{n}$ 上薛定谔算子的波动方程,该算子记为 $\mathcal{H}_0:=-\Delta+V$,其中 $\Delta$ 是标准拉普拉斯算子,$V$ 是复值乘法算子。我们证明,在 $\operatorname{Re}(V)\geq 0$ 且 $\operatorname{Re}(V)(x)\to\infty$(当 $|x|\to\infty$)的条件下,算子 $\mathcal{H}_0$ 在一定条件下具有纯离散谱。秉承 Colombini、De Giorgi 和 Spagnolo 的精神,我们还证明了具有正则系数的柯西问题在相应的 Sobolev 空间中是适定的,并且当传播速度是 Hölder 连续(或更正则)时,该问题在 Gevrey 空间中是适定的。此外,我们证明了当系数具有分布奇异性时,该问题是非常弱适定的。

英文摘要:

This article investigates the wave equation for the Schrödinger operator on $\mathbb{R}^{n}$, denoted as $\mathcal{H}_0:=-Δ+V$, where $Δ$ is the standard Laplacian and $V$ is a complex-valued multiplication operator. We prove that the operator $\mathcal{H}_0$, with $\operatorname{Re}(V)\geq 0$ and $\operatorname{Re}(V)(x)\to\infty$ as $|x|\to\infty$, has a purely discrete spectrum under certain conditions. In the spirit of Colombini, De Giorgi, and Spagnolo, we also prove that the Cauchy problem with regular coefficients is well-posed in the associated Sobolev spaces, and when the propagation speed is Hölder continuous (or more regular), it is well-posed in Gevrey spaces. Furthermore, we prove that it is very weakly well-posed when the coefficients possess a distributional singularity.

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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