Quantization of AdS_3 Black Holes in External Fields

Details Quantization of AdS_3 Black Holes in External Fields Quantization of AdS_3 Black Holes in External Fields

1998-06-15

arxiv.org/abs/hep-th/9806122v1

Phys.Rev.Lett. 81 (1998) 2408-2411

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, Latex

Scientific paper

10.1103/PhysRevLett.81.2408

2+1-dimensional Anti-deSitter gravity is quantized in the presence of an external scalar field. We find that the coupling between the scalar field and gravity is equivalently described by a perturbed conformal field theory at the boundary of AdS_3. We derive the explicit form of this coupling, which allows us to perform a microscopic computation of the transition rates between black hole states due to absorption and induced emission of the scalar field. Detailed thermodynamic balance then yields Hawking radiation as spontaneous emission, and we find agreement with the semiclassical result, including greybody factors. This result also has application to four and five dimensional black holes in supergravity. However, since we only deal with gravitational degrees of freedom, the approach is not based on string theory, and does not depend, either, on the validity of Maldacena's AdS/CFT conjecture.

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