Anti-Evaporation of Black Holes in Bigravity

Abstract

We review properties of solutions in bigravity theory for a specific case where two metric tensors, g µν and f µν , satisfy proportional relation f µν = C 2 g µν . For this condition, we find that the solutions describing the asymptotically de Sitter space-time can be obtained and investigate the perturbation around the Schwarzschild-de Sitter solutions and corresponding anti-evaporation. We discuss the stability under special perturbations related to the anti-evaporation and the importance of the non-diagonal components of the metric in bigravity.

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