Reheating of the Universe as holographic thermalization

Physics Letters B. 2016;759(C):546-549 DOI 10.1016/j.physletb.2016.06.019


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Journal Title: Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)

Publisher: Elsevier

LCC Subject Category: Science: Physics

Country of publisher: Netherlands

Language of fulltext: English

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Shinsuke Kawai (Department of Physics, Sungkyunkwan University, Suwon 16419, Republic of Korea)
Yu Nakayama (California Institute of Technology, 452-48, Pasadena, CA 91125, USA)


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Time From Submission to Publication: 23 weeks


Abstract | Full Text

Assuming gauge/gravity correspondence we study reheating of the Universe using its holographic dual. Inflaton decay and thermalisation of the decay products correspond to collapse of a spherical shell and formation of a blackhole in the dual anti-de Sitter (AdS) spacetime. The reheating temperature is computed as the Hawking temperature of the developed blackhole probed by a dynamical boundary, and is determined by the inflaton energy density and the AdS radius, with corrections from the dynamics of the shell collapse. For given initial energy density of the inflaton field the holographic model typically gives lower reheating temperature than the instant reheating scenario, while it is shown to be safely within phenomenological bounds.