Hawking radiation of an apparent horizon in a FRW universe

Hawking radiation is an important quantum phenomenon of a black hole, which is closely related to the existence of an event horizon of a black hole. The cosmological event horizon of de Sitter space is also of Hawking radiation with a thermal spectrum. By use of the tunneling approach, we show that...

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Bibliographic Details
Published inClassical and quantum gravity Vol. 26; no. 15; pp. 155018 - 155018 (7)
Main Authors Cai, Rong-Gen, Cao, Li-Ming, Hu, Ya-Peng
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 07.08.2009
Institute of Physics
Subjects
Exact sciences and technology
General relativity and gravitation
Physics
Friedmann metric
Thermodynamics
Cosmological horizon
De Sitter metric
Hawking effect
Radiation temperature
Black holes
Cosmology
Friedmann equation
Event horizon
Curvature
Robertson Walker metric
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Summary:Hawking radiation is an important quantum phenomenon of a black hole, which is closely related to the existence of an event horizon of a black hole. The cosmological event horizon of de Sitter space is also of Hawking radiation with a thermal spectrum. By use of the tunneling approach, we show that there is indeed a Hawking radiation with temperature, , for a locally defined apparent horizon of a Friedmann-Robertson-Walker universe with any spatial curvature, where is the apparent horizon radius. Thus we fill in the gap existing in the literature investigating the relation between the first law of thermodynamics and Friedmann equations; there the apparent horizon is assumed to have such a temperature without any proof. In addition, we stress the implication of the Hawking temperature associated with the apparent horizon.
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ISSN:0264-9381
1361-6382
DOI:10.1088/0264-9381/26/15/155018