Hawking radiation of an apparent horizon in a FRW universe

By R. Cai, Li-Ming Cao, Yapeng Hu. 2008

295 citations recorded by the source corpus.

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.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/2e35c4127fb4b2359cad84c64929b0c11c21763a

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In Astronomy and Astrophysics

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Citations in the corpus

Friedmann Equations from Entropic Force (2010, background): “Recently the Hawking temperature associated with the apparent horizon of FRW universe has been showed [8].”
Black holes in gravity with conformal anomaly and logarithmic term in black hole entropy (2009, methodology): “First, we notice that our entropy formula (21) is completely the same as the one associated with the apparent horizon of an FRW universe with the anomaly term [22, 23], which comes out by investigating the relation between the modified Friedmann equation and the first law of thermodynamics [24, 25 ”