Mathematics – Analysis of PDEs
Scientific paper
2006-10-03
Mathematics
Analysis of PDEs
23 pages
Scientific paper
We prove a sharp Mihlin-Hormander multiplier theorem for Schroedinger operators $H$ on $\R^n$. The method, which allows us to deal with general potentials, improves Hebisch's method relying on heat kernel estimates for positive potentials. Our result applies to, in particular, the negative Poeschl-Teller potential $V(x)= -\nu(\nu+1) \sech^2 x $, $\nu\in \N$, for which $H$ has a resonance at zero.
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