Centre for Particle Theory Colloquia: Black hole entropy from horizon constraints
13 November 2007 16:15 in CLC 202
To describe black hole thermodynamics in any quantum theory of
gravity, one must introduce constraints that ensure that a black
hole is actually present. I show that for a very large class of
dilaton black holes, the inclusion of such ``horizon constraints''
allows us to use conformal field theory techniques to compute the
density of states, reproducing the correct Bekenstein-Hawking entropy
in a nearly model-independent manner. This picture suggests an
elegant description of the relevant degrees of freedom, as
Goldstone-boson-like excitations arising from symmetry breaking
by a conformal anomaly induced by the horizon constraints.
Coffee and biscuits at 15:30 in CM 211 (Maths Coffee Room).