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arXiv 2204.04239math.APmath.FAmath.PR
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具有Kato势的非局部Schrodinger算子的热核

Heat kernels of non-local Schrödinger operators with Kato potentials

Tomasz Grzywny, Kamil Kaleta, Paweł Sztonyk

摘要:

研究了具有径向递减轮廓的充分正则对称Lévy测度的薛定谔算子的热核,其动力学项为非局部算子,势属于Kato类.我们的设置是相当普遍和新颖的-它允许我们在一个联合框架中对待重尾和轻尾Lévy措施。我们建立了相应的半群和势的相对Kato界。这使我们能够应用一般的扰动技术来构造热核,并给出尖锐的估计。在Lévy测度和势函数满足更强条件的前提下,进一步得到了热核的正则性.最后,我们讨论了它们在相应半群的光滑性中的应用。我们的结果涵盖了许多重要的例子,非本地运营商,包括分数和准相对论薛定谔运营商。

英文摘要:

We study heat kernels of Schrödinger operators whose kinetic terms are non-local operators built for sufficiently regular symmetric Lévy measures with radial decreasing profiles and potentials belong to Kato class. Our setting is fairly general and novel -- it allows us to treat both heavy- and light-tailed Lévy measures in a joint framework. We establish a certain relative-Kato bound for the corresponding semigroups and potentials. This enables us to apply a general perturbation technique to construct the heat kernels and give sharp estimates of them. Assuming that the Lévy measure and the potential satisfy a little stronger conditions, we additionally obtain the regularity of the heat kernels. Finally, we discuss the applications to the smoothing properties of the corresponding semigroups. Our results cover many important examples of non-local operators, including fractional and quasi-relativistic Schrödinger operators.

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