# Reheating of the Universe as holographic thermalization

## Abstract

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.

- Authors:

- Publication Date:

- Research Org.:
- California Institute of Technology (CalTech), Pasadena, CA (United States)

- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)

- OSTI Identifier:
- 1257864

- Alternate Identifier(s):
- OSTI ID: 1360114; OSTI ID: 1598358

- Grant/Contract Number:
- SC0011632

- Resource Type:
- Published Article

- Journal Name:
- Physics Letters B

- Additional Journal Information:
- Journal Name: Physics Letters B Journal Volume: 759 Journal Issue: C; Journal ID: ISSN 0370-2693

- Publisher:
- Elsevier

- Country of Publication:
- Netherlands

- Language:
- English

- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

### Citation Formats

```
Kawai, Shinsuke, and Nakayama, Yu. Reheating of the Universe as holographic thermalization. Netherlands: N. p., 2016.
Web. https://doi.org/10.1016/j.physletb.2016.06.019.
```

```
Kawai, Shinsuke, & Nakayama, Yu. Reheating of the Universe as holographic thermalization. Netherlands. https://doi.org/10.1016/j.physletb.2016.06.019
```

```
Kawai, Shinsuke, and Nakayama, Yu. Mon .
"Reheating of the Universe as holographic thermalization". Netherlands. https://doi.org/10.1016/j.physletb.2016.06.019.
```

```
@article{osti_1257864,
```

title = {Reheating of the Universe as holographic thermalization},

author = {Kawai, Shinsuke and Nakayama, Yu},

abstractNote = {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.},

doi = {10.1016/j.physletb.2016.06.019},

journal = {Physics Letters B},

number = C,

volume = 759,

place = {Netherlands},

year = {2016},

month = {8}

}

https://doi.org/10.1016/j.physletb.2016.06.019

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