Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies

We illustrate how a group of symmetry transformations, which preserve the form of the n-dimensional flat Friedmann-Robertson-Walker cosmologies satisfying Einstein's equations, act in any dimension. This group relates the energy density and the isotropic pressure of the cosmic fluid to the expa...

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Autores principales: Cataldo, Horacio Máximo, Chimento, Luis Pascual
Publicado: 2008
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02182718_v17_n11_p1981_Cataldo
http://hdl.handle.net/20.500.12110/paper_02182718_v17_n11_p1981_Cataldo
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_02182718_v17_n11_p1981_Cataldo2025-07-30T17:59:49Z Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies Cataldo, Horacio Máximo Chimento, Luis Pascual We illustrate how a group of symmetry transformations, which preserve the form of the n-dimensional flat Friedmann-Robertson-Walker cosmologies satisfying Einstein's equations, act in any dimension. This group relates the energy density and the isotropic pressure of the cosmic fluid to the expansion rate. The freedom associated with the dimension of the space-time yields assisted inflation even when the energy density of the fluid is a dimensional invariant and enriches the set of duality transformations leading to phantom cosmologies. © 2008 World Scientific Publishing Company. Fil:Cataldo, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Chimento, L.P. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02182718_v17_n11_p1981_Cataldo http://hdl.handle.net/20.500.12110/paper_02182718_v17_n11_p1981_Cataldo
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 illustrate how a group of symmetry transformations, which preserve the form of the n-dimensional flat Friedmann-Robertson-Walker cosmologies satisfying Einstein's equations, act in any dimension. This group relates the energy density and the isotropic pressure of the cosmic fluid to the expansion rate. The freedom associated with the dimension of the space-time yields assisted inflation even when the energy density of the fluid is a dimensional invariant and enriches the set of duality transformations leading to phantom cosmologies. © 2008 World Scientific Publishing Company.
author Cataldo, Horacio Máximo
Chimento, Luis Pascual
spellingShingle Cataldo, Horacio Máximo
Chimento, Luis Pascual
Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies
author_facet Cataldo, Horacio Máximo
Chimento, Luis Pascual
author_sort Cataldo, Horacio Máximo
title Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies
title_short Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies
title_full Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies
title_fullStr Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies
title_full_unstemmed Form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies
title_sort form invariant transformations between n- and m-dimensional flat friedmann-robertson-walker cosmologies
publishDate 2008
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02182718_v17_n11_p1981_Cataldo
http://hdl.handle.net/20.500.12110/paper_02182718_v17_n11_p1981_Cataldo
work_keys_str_mv AT cataldohoraciomaximo forminvarianttransformationsbetweennandmdimensionalflatfriedmannrobertsonwalkercosmologies
AT chimentoluispascual forminvarianttransformationsbetweennandmdimensionalflatfriedmannrobertsonwalkercosmologies
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