Thermodynamics and phases in quantum gravity

Details Thermodynamics and phases in quantum gravity Thermodynamics and phases in quantum gravity

2008-12-02

arxiv.org/abs/0812.0399v2

Class.Quant.Grav.26:075010,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, 1 figure; matches published version

Scientific paper

10.1088/0264-9381/26/7/075010

We give an approach for studying quantum gravity effects on black hole thermodynamics. This combines a quantum framework for gravitational collapse with quasi-local definitions of energy and surface gravity. Our arguments suggest that (i) the specific heat of a black hole becomes positive after a phase transition near the Planck scale,(ii) its entropy acquires a logarithmic correction, and (iii) the mass loss rate is modified such that Hawking radiation stops near the Planck scale. These results are due essentially to a realization of fundamental discreteness in quantum gravity, and are in this sense potentially theory independent.

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