Physics
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phrvd..46.1312p&link_type=abstract
Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 46, Issue 4, 15 August 1992, pp.1312-1327
Physics
8
Black Holes, Fundamental Problems And General Formalism
Scientific paper
This article is an investigation of the physics which underlies Hawking radiation from rotating black holes. It is shown that a global scalar field theory which is compatible with the equivalence principle demands that a rotating black hole in isolation experience thermal evaporation. The main goal of this paper is to attain a physical understanding of the phenomenon with a particular emphasis on computing the renormalized stress-energy tensor in the asymptotic zones, near the event horizon and at stationary infinity. This tensor is shown to be a measure of the change in the zero-point oscillations of the local field theory which is formulated by inertial observers during free fall, as compared to a global standard. An external onlooker sees the zero-point energy in a freely falling coordinate patch decrease as it approaches the horizon. This translates to a negative energy density of the field, near the horizon, in the components of the renormalized stress-energy tensor. The external onlooker interprets the zero-point energy lost during free fall as an outgoing stream of particle-antiparticle pairs.
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