Stability and Anti-evaporation of the Schwarzschild-de Sitter Black Holes in Bigravity

Abstract

We study the stability under the perturbation and the related anti-evaporation of the Nariai space-time in bigravity. If we impose specific condition for the solutions and parameters, we obtain asymptotically de Sitter space-time, and show the existence of the Nariai space-time as a background solution. Considering the perturbation around the Nariai space-time up to first order, we investigate the behavior of black hole horizon. We show that the anti-evaporation does not occur on the classical level in the bigravity.

9 pages, 1 figure

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• Evaporation and Antievaporation instabilities