Conformal nature of the Hawking radiation

Details Conformal nature of the Hawking radiation Conformal nature of the Hawking radiation

2000-02-29

arxiv.org/abs/hep-th/0002258v1

JHEP 0004 (2000) 032

Physics

High Energy Physics

High Energy Physics - Theory

21 pages, no figures

Scientific paper

10.1088/1126-6708/2000/04/032

String theory usually represents quantum black holes as systems whose statistical mechanics reproduces Hawking's thermodynamics in a very satisfactory way. Complicated brane theoretical models are worked out, as quantum versions of Supergravity solutions. These models are then assumed to be in thermal equilibrium: this is a little cheating, because one is looking for an explanation of the seeming thermodynamical nature of black holes, so they cannot be {\it assumed} to be finite temperature systems! In the model presented here, the black body spectrum arises with no statistical hypothesis as an approximation of the unitary evolution of microscopic black holes, which are always described by a 1+1 conformal field theory, characterized by some Virasoro algebra. At the end, one can state that {\it the Hawking-thermodynamics of the system is a by-product of the algebraic Virasoro-symmetric nature of the event horizon}. This is {\it the central result} of the present work.

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