Radiation via tunneling from a de Sitter cosmological horizon

A. J. M. Medved
Phys. Rev. D 66, 124009 – Published 20 December 2002
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Abstract

Hawking radiation can usefully be viewed as a semiclassical tunneling process that originates at the black hole horizon. The same basic premise should apply to de Sitter background radiation, with the cosmological horizon of de Sitter space now playing the featured role. In fact, a recent work (M. K. Parikh, hep-th/0204107) has gone a long way to verifying the validity of this de Sitter–tunneling picture. In the current paper, we extend these prior considerations to arbitrary-dimensional de Sitter space, as well as Schwarzschild–de Sitter spacetimes. It is shown that the tunneling formalism naturally censors against any black hole with a mass in excess of the Nariai value, thus enforcing a “third law” of Schwarzschild–de Sitter thermodynamics. We also provide commentary on the dS/conformal field theory correspondence in the context of this tunneling framework.

  • Received 25 August 2002

DOI:https://doi.org/10.1103/PhysRevD.66.124009

©2002 American Physical Society

Authors & Affiliations

A. J. M. Medved,*

  • Department of Physics and Theoretical Physics Institute, University of Alberta, Edmonton, Canada T6G 2J1

  • *Email address: amedved@phys.ualberta.ca

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Issue

Vol. 66, Iss. 12 — 15 December 2002

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