Isomorphism properties of Toeplitz operators and pseudo-differential operators between modulation spaces

Abstract

We investigate the lifting property of modulation spaces and construct explicit isomorpisms between them. For each weight function $\omega$ and suitable window function $\fy $, the Toeplitz operator (or localization operator) $\tp_\fy (\omega)$ is an isomorphism from $M^{p,q}_{(\omega_0)}$ onto $M^{p,q}_{(\omega_0/\omega)}$ for every $p,q \in [1,\infty ]$ and arbitrary weight function $\omega_0$. The methods involve the pseudo-differential calculus of Bony and Chemin and the Wiener algebra property of certain symbol classes of pseudo-differential operators.