A sharp weighted Fourier extension estimate for the cone in $\mathbb{R}^3$ based on circle tangencies

TL;DR

This paper establishes sharp weighted Fourier extension estimates for the cone in three-dimensional space using circle tangency techniques, improving previous Mizohata--Takeuchi bounds.

Contribution

It introduces a novel application of circle tangency estimates to derive sharper Fourier extension bounds for the cone in D, advancing the understanding of decoupling and restriction phenomena.

Findings

Improved Mizohata--Takeuchi-type estimates for the cone in D

Application of circle tangency estimates to Fourier extension problems

Enhanced bounds for 1-dimensional weights in Fourier analysis

Abstract

We apply recent circle tangency estimates due to Pramanik--Yang--Zahl to prove sharp weighted Fourier extension estimates for the cone in $\mathbb{R}^3$ and $1$-dimensional weights. The idea of using circle tangency estimates to study Fourier extension of the cone is originally due to Tom Wolff, who used it in part to prove the first decoupling estimates. We make an improvement to the best known Mizohata--Takeuchi-type estimates for the cone in $\mathbb{R}^3$ and the $1$-dimensional weights as a corollary of our main theorem, where the previously best known bound follows as a corollary of refined decoupling estimates.