Killing horizons kill horizon degrees

Details Killing horizons kill horizon degrees Killing horizons kill horizon degrees

2006-05-30

arxiv.org/abs/gr-qc/0605148v2

Int.J.Mod.Phys.D15:2279-2284,2006

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

5 pages, received honorable mention in the GRF Essay Contest 2006, v2: version to be published in IJMPD

Scientific paper

10.1142/S0218271806009571

Frequently it is argued that the microstates responsible for the Bekenstein-Hawking entropy should arise from some physical degrees of freedom located near or on the black hole horizon. In this Essay we elucidate that instead entropy may emerge from the conversion of physical degrees of freedom, attached to a generic boundary, into unobservable gauge degrees of freedom attached to the horizon. By constructing the reduced phase space it can be demonstrated that such a transmutation indeed takes place for a large class of black holes, including Schwarzschild.

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