Uniqueness of self-shrinking ends asymptotic to a cylindrical cone

Abstract

Let $C^m \subset \mathbb{R}^{m+n}$ be a regular embedded cone, where $n\geq 1$, and let $k\geq 1$. We prove that two smooth, connected, properly embedded self-shrinking ends whose blow-downs converge locally smoothly to the same cylindrical cone $C\times\mathbb{R}^k$ away from the axis $\{0\}\times\mathbb{R}^k$ must coincide. As a consequence, we obtain a rigidity result for complete self-shrinkers asymptotic to cylindrical cones. The proof uses Gaussian decay estimates and a sectorial Carleman estimate to establish backward uniqueness.