Strichartz estimates for Schrödinger equations in weighted $L^2$ spaces and their applications

Abstract

We obtain weighted $L^2$ Strichartz estimates for Schrödinger equations $i{\partial }_{t}u+(-\Delta {)}^{a/2}u=F(x,t)$, $u(x,0)=f(x)$, of general orders $a>1$ with radial data $f,F$ with respect to the spatial variable $x$, whenever the weight is in a Morrey-Campanato type class. This is done by making use of a useful property of maximal functions of the weights together with frequency-localized estimates which follow from using bilinear interpolation and some estimates of Bessel functions. As consequences, we give an affirmative answer to a question posed in \cite{BBCRV} concerning weighted homogeneous Strichartz estimates, and improve previously known Morawetz estimates. We also apply the weighted $L^2$ estimates to the well-posedness theory for the Schrödinger equations with time-dependent potentials in the class.

To appear in Discrete Contin. Dyn. Syst., 32 pages

References in corpus (3)

• Mass concentration for the $L^2$-critical Nonlinear Schrödinger equations of higher orders
• From resolvent estimates to unique continuation for the Schrödinger equation
• On weighted $L^2$ estimates for solutions of the wave equation