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Multi-field inflation from holography

Multi-field inflation from holography
Multi-field inflation from holography
We initiate the study of multi-field inflation using holography. Bulk light scalar fields correspond to nearly marginal operators in the boundary theory and the dual quantum field theory is a deformation of a CFT by such operators. We compute the power spectra of adiabatic and entropy perturbations in a simple model and find that the adiabatic curvature perturbation is not conserved in the presence of entropy perturbations but becomes conserved when the entropy perturbations are set to zero or the model is effectively a single scalar model, in agreement with expectations from cosmological perturbation theory.
1475-7516
1-24
Garriga, Jaume
1312ea46-55c7-4e96-8597-ec206882516c
Skenderis, Kostas
09f32871-ffb1-4f4a-83bc-df05f4d17a09
Urakawa, Yuko
2c509553-da6d-4f53-a69f-a8197ad6f5c0
Garriga, Jaume
1312ea46-55c7-4e96-8597-ec206882516c
Skenderis, Kostas
09f32871-ffb1-4f4a-83bc-df05f4d17a09
Urakawa, Yuko
2c509553-da6d-4f53-a69f-a8197ad6f5c0

Garriga, Jaume, Skenderis, Kostas and Urakawa, Yuko (2015) Multi-field inflation from holography. Journal of Cosmology and Astroparticle Physics, 2015 (28), 1-24. (doi:10.1088/1475-7516/2015/01/028).

Record type: Article

Abstract

We initiate the study of multi-field inflation using holography. Bulk light scalar fields correspond to nearly marginal operators in the boundary theory and the dual quantum field theory is a deformation of a CFT by such operators. We compute the power spectra of adiabatic and entropy perturbations in a simple model and find that the adiabatic curvature perturbation is not conserved in the presence of entropy perturbations but becomes conserved when the entropy perturbations are set to zero or the model is effectively a single scalar model, in agreement with expectations from cosmological perturbation theory.

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More information

Accepted/In Press date: 19 December 2014
Published date: 21 January 2015
Organisations: Applied Mathematics

Identifiers

Local EPrints ID: 391637
URI: http://eprints.soton.ac.uk/id/eprint/391637
DOI: doi:10.1088/1475-7516/2015/01/028
ISSN: 1475-7516
PURE UUID: 350ad836-1f87-4797-adab-028dd6f30315
ORCID for Kostas Skenderis: ORCID iD orcid.org/0000-0003-4509-5472

Catalogue record

Date deposited: 24 May 2016 14:00
Last modified: 15 Mar 2024 03:41

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Contributors

Author: Jaume Garriga
Author: Kostas Skenderis ORCID iD
Author: Yuko Urakawa

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