Local/global well-posedness analysis of time-space fractional Schr\"{o}dinger equation on $\mathbb{R}^{d}$

TL;DR

This paper analyzes the well-posedness of a class of nonlinear time-space fractional Schr"odinger equations with nonlocal effects, establishing new Sobolev estimates and extending the understanding of such equations beyond classical methods.

Contribution

It introduces novel Sobolev estimates and well-posedness results for fractional Schr"odinger equations using harmonic analysis techniques, complementing prior work with different methods.

Findings

Established Gagliardo-Nirenberg inequality in $\, ext{phi}$-Triebel-Lizorkin space.

Proved global and local well-posedness in Banach spaces.

Extended the analysis of fractional Schr"odinger equations with nonlocal effects.

Abstract

Based on the $\phi(-\Delta)$-type operator studied by Kim \cite[\emph{Adv. Math.}]{Kim2}, where $\phi$ is the Bernstein function, this paper investigates a class of nonlinear time-space fractional Schr\"{o}dinger equations that exhibit nonlocal effects in both time and space. The time part is derived from the model proposed by Narahari Achar, and the space part is a $\phi(-\Delta)$-type operator. Due to nonlocal effects, this invalidates the classical Strichartz estimate. Combining the asymptotic behavior of Mittag-Leffler functions, H\"{o}rmander multiplier theory and other methods of harmonic analysis, we establish the Gagliardo-Nirenberg inequality in the $\phi$-Triebel-Lizorkin space studied by Mikulevi\v{c}ius \cite[\emph{Potential Anal.}]{Mikulevicius} and obtain some Sobolev estimates for the solution operator, thus establishing the global/local well-posedness of the equations in some Banach space. In particular, our results are complementary to those of Su \cite[\emph{J. Math. Anal. Appl.}]{Su}, and the methods are quite different.