Black holes, brick walls and the Boulware state

Details Black holes, brick walls and the Boulware state Black holes, brick walls and the Boulware state

1998-06-03

arxiv.org/abs/gr-qc/9806012v2

Phys.Rev. D58 (1998) 104005

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Latex, 27 pages

Scientific paper

10.1103/PhysRevD.58.104005

The brick-wall model seeks to explain the Bekenstein-Hawking entropy as a wall-contribution to the thermal energy of ambient quantum fields raised to the Hawking temperature. Reservations have been expressed concerning the self-consistency of this model. For example, it predicts large thermal energy densities near the wall, producing a substantial mass-correction and, presumably, a large gravitational back-reaction. We re-examine this model and conclude that these reservations are unfounded once the ground state---the Boulware state---is correctly identified. We argue that the brick-wall model and the Gibbons-Hawking instanton (which ascribes a topological origin to the Bekenstein-Hawking entropy) are mutually exclusive, alternative descriptions (complementary in the sense of Bohr) of the same physics.

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