Reheating of the Universe as holographic thermalization

Journal Article · 14 June 2016 · Physics Letters. B

DOI: https://doi.org/10.1016/j.physletb.2016.06.019 · OSTI ID:1257864

Kawai, Shinsuke  ^[1]; Nakayama, Yu ^[2]

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1. Sungkyunkwan Univ., Suwon (Republic of Korea)
2. California Inst. of Technology (CalTech), Pasadena, CA (United States); Kavli Institute for the Physics and Mathematics of the Universe (WPI), Chiba (Japan)

Here, 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 gives significantly lower reheating temperature than the instant reheating scenario, while it is shown to be safely within phenomenological bounds.

• Research Organization: California Institute of Technology (CalTech), Pasadena, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP); USDOE
• Grant/Contract Number: SC0011632
• OSTI ID: 1257864
• Alternate ID(s): OSTI ID: 1360114; OSTI ID: 1598358
• Journal Information: Physics Letters. B, Vol. 759, Issue C; ISSN 0370-2693
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English