Physics-to-gauge conversion at black hole horizons

Details Physics-to-gauge conversion at black hole horizons Physics-to-gauge conversion at black hole horizons

2005-12-19

arxiv.org/abs/hep-th/0512230v3

Class.Quant.Grav.23:3075-3101,2006; Class.Quant.Grav.23:3075-3102,2006

Physics

High Energy Physics

High Energy Physics - Theory

32 pages, uses iopart_mod.cls, v2: added ref, v3: added paragraph in conclusions

Scientific paper

10.1088/0264-9381/23/9/019

Requiring the presence of a horizon imposes constraints on the physical phase space. After a careful analysis of dilaton gravity in 2D with boundaries (including the Schwarzschild and Witten black holes as prominent examples), it is shown that the classical physical phase space is smaller as compared to the generic case if horizon constraints are imposed. Conversely, the number of gauge symmetries is larger for the horizon scenario. In agreement with a recent conjecture by 't Hooft, we thus find that physical degrees of freedom are converted into gauge degrees of freedom at a horizon.

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