Modified teleparallel gravity: Inflation without an inflaton

The Born-Infeld strategy to smooth theories having divergent solutions is applied to the teleparallel equivalent of general relativity. Differing from other theories of modified gravity, modified teleparallelism leads to second order equations, since the teleparallel Lagrangian only contains first d...

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Autores principales: Ferraro, R., Fiorini, F.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_15507998_v75_n8_p_Ferraro
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_15507998_v75_n8_p_Ferraro2023-10-03T16:24:03Z Modified teleparallel gravity: Inflation without an inflaton Ferraro, R. Fiorini, F. The Born-Infeld strategy to smooth theories having divergent solutions is applied to the teleparallel equivalent of general relativity. Differing from other theories of modified gravity, modified teleparallelism leads to second order equations, since the teleparallel Lagrangian only contains first derivatives of the vierbein. We show that the Born-Infeld-modified teleparallelism solves the particle horizon problem in a spatially flat Friedmann-Robertson-Walker (FRW) universe by providing an initial exponential expansion without resorting to an inflaton field. © 2007 The American Physical Society. Fil:Ferraro, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Fiorini, F. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15507998_v75_n8_p_Ferraro
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The Born-Infeld strategy to smooth theories having divergent solutions is applied to the teleparallel equivalent of general relativity. Differing from other theories of modified gravity, modified teleparallelism leads to second order equations, since the teleparallel Lagrangian only contains first derivatives of the vierbein. We show that the Born-Infeld-modified teleparallelism solves the particle horizon problem in a spatially flat Friedmann-Robertson-Walker (FRW) universe by providing an initial exponential expansion without resorting to an inflaton field. © 2007 The American Physical Society.
format JOUR
author Ferraro, R.
Fiorini, F.
spellingShingle Ferraro, R.
Fiorini, F.
Modified teleparallel gravity: Inflation without an inflaton
author_facet Ferraro, R.
Fiorini, F.
author_sort Ferraro, R.
title Modified teleparallel gravity: Inflation without an inflaton
title_short Modified teleparallel gravity: Inflation without an inflaton
title_full Modified teleparallel gravity: Inflation without an inflaton
title_fullStr Modified teleparallel gravity: Inflation without an inflaton
title_full_unstemmed Modified teleparallel gravity: Inflation without an inflaton
title_sort modified teleparallel gravity: inflation without an inflaton
url http://hdl.handle.net/20.500.12110/paper_15507998_v75_n8_p_Ferraro
work_keys_str_mv AT ferraror modifiedteleparallelgravityinflationwithoutaninflaton
AT fiorinif modifiedteleparallelgravityinflationwithoutaninflaton
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