The de Sitter/Anti- de Sitter Black Holes phase transition?

Details The de Sitter/Anti- de Sitter Black Holes phase transition? The de Sitter/Anti- de Sitter Black Holes phase transition?

2001-12-26

arxiv.org/abs/gr-qc/0112066v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

LaTeX file 7pages, to appear in the Proceedings of the ``1st Mexican Meeting on Mathematical and Experimental Physics", held a

Scientific paper

We investigate the Schwarzschild-Anti-deSitter (SAdS) and SdS BH thermodynamics in 5d higher derivative gravity. The interesting feature of higher derivative gravity is the possibility for negative (or zero) SdS (or SAdS) BH entropy which depends on the parameters of higher derivative terms. The appearence of negative entropy may indicate a new type instability where a transition between SdS (SAdS) BH with negative entropy to SAdS (SdS) BH with positive entropy would occur or where definition of entropy should be modified.

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