Boundedness of Schroedinger type propagators on modulation spaces

Abstract

It is known that Fourier integral operators arising when solving Schrödinger-type operators are bounded on the modulation spaces $\cM^{p,q}$, for $1\le p=q\le \infty$, provided their symbols belong to the Sjöstrand class $M^{\infty ,1}$. However, they generally fail to be bounded on $\cM^{p,q}$ for $p\ne q$. In this paper we study several additional conditions, to be imposed on the phase or on the symbol, which guarantee the boundedness on $\cM^{p,q}$ for $p\ne q$, and between $\cM^{p,q}\to\cM^{q,p}$, $1\le q<p\le \infty$. We also study similar problems for operators acting on Wiener amalgam spaces, recapturing, in particular, some recent results for metaplectic operators. Our arguments make heavily use of the uncertainty principle.

30 pages

References in corpus (1)

• Some new Strichartz estimates for the Schrödinger equation