A covariant approach to general field space metric in multi-field inflation

We present a covariant formalism for general multi-field system which enables us to obtain higher order action of cosmological perturbations easily and systematically. The effects of the field space geometry, described by the Riemann curvature tensor of the field space, are naturally incorporated. W...

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Detalles Bibliográficos
Autores principales: Gong, Jinn-Ouk, Tanaka, Takahiro
Lenguaje:eng
Publicado: 2011
Materias:
Astrophysics and Astronomy
Acceso en línea:https://dx.doi.org/10.1088/1475-7516/2011/03/015
https://dx.doi.org/10.1088/1475-7516/2012/02/E01
http://cds.cern.ch/record/1324695
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author Gong, Jinn-Ouk
Tanaka, Takahiro
author_facet Gong, Jinn-Ouk
Tanaka, Takahiro
author_sort Gong, Jinn-Ouk
collection CERN
description We present a covariant formalism for general multi-field system which enables us to obtain higher order action of cosmological perturbations easily and systematically. The effects of the field space geometry, described by the Riemann curvature tensor of the field space, are naturally incorporated. We explicitly calculate up to the cubic order action which is necessary to estimate non-Gaussianity and present those geometric terms which have not yet known before.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
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spelling cern-13246952021-07-16T00:01:55Zdoi:10.1088/1475-7516/2011/03/015doi:10.1088/1475-7516/2012/02/E01http://cds.cern.ch/record/1324695engGong, Jinn-OukTanaka, TakahiroA covariant approach to general field space metric in multi-field inflationAstrophysics and AstronomyWe present a covariant formalism for general multi-field system which enables us to obtain higher order action of cosmological perturbations easily and systematically. The effects of the field space geometry, described by the Riemann curvature tensor of the field space, are naturally incorporated. We explicitly calculate up to the cubic order action which is necessary to estimate non-Gaussianity and present those geometric terms which have not yet known before.We present a covariant formalism for general multi-field system which enables us to obtain higher order action of cosmological perturbations easily and systematically. The effects of the field space geometry, described by the Riemann curvature tensor of the field space, are naturally incorporated. We explicitly calculate up to the cubic order action which is necessary to estimate non-Gaussianity and present those geometric terms which have not yet known before.arXiv:1101.4809CERN-PH-TH-2011-012YITP-11-9CERN-PH-TH-2011-012YITP-11-9oai:cds.cern.ch:13246952011-01-26
spellingShingle Astrophysics and Astronomy
Gong, Jinn-Ouk
Tanaka, Takahiro
A covariant approach to general field space metric in multi-field inflation
title A covariant approach to general field space metric in multi-field inflation
title_full A covariant approach to general field space metric in multi-field inflation
title_fullStr A covariant approach to general field space metric in multi-field inflation
title_full_unstemmed A covariant approach to general field space metric in multi-field inflation
title_short A covariant approach to general field space metric in multi-field inflation
title_sort covariant approach to general field space metric in multi-field inflation
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1088/1475-7516/2011/03/015
https://dx.doi.org/10.1088/1475-7516/2012/02/E01
http://cds.cern.ch/record/1324695
work_keys_str_mv AT gongjinnouk acovariantapproachtogeneralfieldspacemetricinmultifieldinflation
AT tanakatakahiro acovariantapproachtogeneralfieldspacemetricinmultifieldinflation
AT gongjinnouk covariantapproachtogeneralfieldspacemetricinmultifieldinflation
AT tanakatakahiro covariantapproachtogeneralfieldspacemetricinmultifieldinflation

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