Resolvent estimates for spacetimes bounded by Killing horizons
arXiv:1705.04251 · doi:10.2140/apde.2019.12.537
Abstract
We show that the resolvent grows at most exponentially with frequency for the wave equation on a class of stationary spacetimes which are bounded by non-degenerate Killing horizons, without any assumptions on the trapped set. Correspondingly, there exists an exponentially small resonance-free region, and solutions of the Cauchy problem exhibit logarithmic energy decay.
27 pages. Contains some improved results. To appear in Anal. PDE