Restriction estimates via the derivatives of the heat semigroup and connexion with dispersive estimates

TL;DR

This paper establishes a new characterization of restriction estimates for self-adjoint operators using derivatives of the heat semigroup, linking dispersive estimates to restriction estimates and providing new $L^p-L^{p'}$ bounds.

Contribution

It introduces a novel characterization of restriction estimates via heat semigroup derivatives and offers an alternative proof connecting dispersive and restriction estimates.

Findings

Derived a characterization of restriction estimates in terms of heat semigroup derivatives.

Provided an alternative proof that dispersive estimates imply restriction estimates.

Established $L^p-L^{p'}$ estimates for derivatives of the spectral resolution.

Abstract

We consider an abstract non-negative self-adjoint operator $H$ on an $L^2$-space. We derive a characterization for the restriction estimate $\| dE_H(\lambda) \|_{L^p \to L^{p'}} \le C \lambda^{\frac{d}{2}(\frac{1}{p} - \frac{1}{p'}) -1}$ in terms of higher order derivatives of the semigroup $e^{-tH}$. We provide an alternative proof of a result in [1] which asserts that dispersive estimates imply restriction estimates. We also prove $L^p-L^{p'}$ estimates for the derivatives of the spectral resolution of $H$.