## Illinois Journal of Mathematics

### Spectral multipliers for Schrödinger operators

Shijun Zheng

#### Abstract

We prove a sharp Hörmander multiplier theorem for Schrödinger operators $H=-\Delta+V$ on $\mathbb{R}^n$. The result is obtained under certain condition on a weighted $L^\infty$ estimate, coupled with a weighted $L^2$ estimate for $H$, which is a weaker condition than that for nonnegative operators via the heat kernel approach. Our approach is elaborated in one dimension with potential $V$ belonging to certain critical weighted $L^1$ class. Namely, we assume that $\int(1+|x|) |V(x)|\,dx$ is finite and $H$ has no resonance at zero. In the resonance case, we assume $\int(1+|x|^2) |V(x)|\, dx$ is finite.

#### Article information

Source
Illinois J. Math., Volume 54, Number 2 (2010), 621-647.

Dates
First available in Project Euclid: 14 October 2011

https://projecteuclid.org/euclid.ijm/1318598675

Digital Object Identifier
doi:10.1215/ijm/1318598675

Mathematical Reviews number (MathSciNet)
MR2846476

Zentralblatt MATH identifier
1235.42008

Subjects

#### Citation

Zheng, Shijun. Spectral multipliers for Schrödinger operators. Illinois J. Math. 54 (2010), no. 2, 621--647. doi:10.1215/ijm/1318598675. https://projecteuclid.org/euclid.ijm/1318598675

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