Hyperbolic mass via horospheres
Differential Geometry
2022-03-30 v2 General Relativity and Quantum Cosmology
Abstract
We derive geometric formulas for the mass of asymptotically hyperbolic manifolds using coordinate horospheres. As an application, we obtain a new rigidity result of hyperbolic space: if a complete asymptotically hyperbolic manifold has scalar curvature lower bound -n(n-1) and is isometric to hyperbolic space outside a coordinate horosphere, then the manifold is isometric to hyperbolic space. In addition, we apply our formula to investigate regions near infinity that do not contribute to the mass quantity, which leads to improved rigidity results of hyperbolic space.
Cite
@article{arxiv.2102.01036,
title = {Hyperbolic mass via horospheres},
author = {Hyun Chul Jang and Pengzi Miao},
journal= {arXiv preprint arXiv:2102.01036},
year = {2022}
}
Comments
22 pages; v2: minor changes. To appear in Commun. Contemp. Math