Interface of General Relativity, Quantum Physics and Statistical Mechanics: Some Recent Developments
arXiv:gr-qc/9910101 · doi:10.1002/(SICI)1521-3889(200005)9:3/5<178::AID-ANDP178>3.0.CO;2-U
Abstract
The arena normally used in black holes thermodynamics was recently generalized to incorporate a broad class of physically interesting situations. The key idea is to replace the notion of stationary event horizons by that of `isolated horizons.' Unlike event horizons, isolated horizons can be located in a space-time quasi-locally. Furthermore, they need not be Killing horizons. In particular, a space-time representing a black hole which is itself in equilibrium, but whose exterior contains radiation, admits an isolated horizon. In spite of this generality, the zeroth and first laws of black hole mechanics extend to isolated horizons. Furthermore, by carrying out a systematic, non-perturbative quantization, one can explore the quantum geometry of isolated horizons and account for their entropy from statistical mechanical considerations. After a general introduction to black hole thermodynamics as a whole, these recent developments are briefly summarized.
20 pages, 5 figures. Based on a talk given at the 99 Journees Relativistes held at Weimar. To appear in Annalen der Physik
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