BLACK HOLE ENTROPY IN HIGHER CURVATURE GRAVITY

Details BLACK HOLE ENTROPY IN HIGHER CURVATURE GRAVITY BLACK HOLE ENTROPY IN HIGHER CURVATURE GRAVITY

1995-02-02

arxiv.org/abs/gr-qc/9502009v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

18 pages, LaTeX, Based on talks presented at the 16th Annual MRST Meeting and at the Heat Kernel Techniques and Quantum Gravit

Scientific paper

We discuss some recent results on black hole thermodynamics within the context of effective gravitational actions including higher-curvature interactions. Wald's derivation of the First Law demonstrates that black hole entropy can always be expressed as a local geometric density integrated over a space-like cross-section of the horizon. In certain cases, it can also be shown that these entropy expressions satisfy a Second Law. One such simple example is considered from the class of higher curvature theories where the Lagrangian consists of a polynomial in the Ricci scalar.

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