Symmetry and inflation

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We find the group of symmetry transformations under which the Einstein equations for the spatially flat Friedmann-Robertson-Walker universe are form invariant. They relate the energy density and the pressure of the fluid to the expansion rate. We show that inflation can be obtained from nonaccelerat...

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Autor principal: Chimento, L.P.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_15507998_v65_n6_p6_Chimento
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_15507998_v65_n6_p6_Chimento
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spelling todo:paper_15507998_v65_n6_p6_Chimento2023-10-03T16:23:48Z Symmetry and inflation Chimento, L.P. We find the group of symmetry transformations under which the Einstein equations for the spatially flat Friedmann-Robertson-Walker universe are form invariant. They relate the energy density and the pressure of the fluid to the expansion rate. We show that inflation can be obtained from nonaccelerated scenarios by a symmetry transformation. We derive the transformation rule for the spectrum and spectral index of the curvature perturbations. Finally, the group is extended to investigate inflation in the anisotropic Bianchi type-I spacetime and the brane-world cosmology. © 2002 The American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15507998_v65_n6_p6_Chimento
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We find the group of symmetry transformations under which the Einstein equations for the spatially flat Friedmann-Robertson-Walker universe are form invariant. They relate the energy density and the pressure of the fluid to the expansion rate. We show that inflation can be obtained from nonaccelerated scenarios by a symmetry transformation. We derive the transformation rule for the spectrum and spectral index of the curvature perturbations. Finally, the group is extended to investigate inflation in the anisotropic Bianchi type-I spacetime and the brane-world cosmology. © 2002 The American Physical Society.
format JOUR
author Chimento, L.P.
spellingShingle Chimento, L.P.
Symmetry and inflation
author_facet Chimento, L.P.
author_sort Chimento, L.P.
title Symmetry and inflation
title_short Symmetry and inflation
title_full Symmetry and inflation
title_fullStr Symmetry and inflation
title_full_unstemmed Symmetry and inflation
title_sort symmetry and inflation
url http://hdl.handle.net/20.500.12110/paper_15507998_v65_n6_p6_Chimento
work_keys_str_mv AT chimentolp symmetryandinflation
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