Bouncing loop quantum cosmology from F(T) gravity

The big bang singularity could be understood as a breakdown of Einstein’s general relativity at very high energies. By adopting this viewpoint, other theories that implement Einstein cosmology at high energies might solve the problem of the primeval singularity. One of them is loop quantum cosmology...

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Detalles Bibliográficos
Autores: Amorós Torrent, Jaume|||0000-0002-3133-9985, Haro Cases, Jaume|||0000-0002-5705-2405, Odintsov, Sergei D.
Tipo de recurso: artículo
Fecha de publicación:2013
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/20717
Acceso en línea:https://hdl.handle.net/2117/20717
https://dx.doi.org/10.1103/PhysRevD.87.104037
Access Level:acceso abierto
Palabra clave:Gravity
Cosmology
general relativity quantum cosmology
Gravetat
Cosmologia
Àrees temàtiques de la UPC::Matemàtiques i estadística
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spelling Bouncing loop quantum cosmology from F(T) gravityAmorós Torrent, Jaume|||0000-0002-3133-9985Haro Cases, Jaume|||0000-0002-5705-2405Odintsov, Sergei D.GravityCosmologygeneral relativity quantum cosmologyGravetatCosmologiaÀrees temàtiques de la UPC::Matemàtiques i estadísticaThe big bang singularity could be understood as a breakdown of Einstein’s general relativity at very high energies. By adopting this viewpoint, other theories that implement Einstein cosmology at high energies might solve the problem of the primeval singularity. One of them is loop quantum cosmology (LQC) with a small cosmological constant that models a universe moving along an ellipse, which prevents singularities like the big bang or the big rip, in the phase space ð H; Þ , where H is the Hubble parameter and the energy density of the universe. Using LQC one considers a model universe filled by radiation and matter where, due to the cosmological constant, there are a de Sitter and an anti–de Sitter solution. This means that one obtains a bouncing nonsingular universe which is in the contracting phase at early times. After leaving this phase, i.e., after bouncing, it passes trough a radiation- and matter-dominated phase and finally at late times it expands in an accelerated way (current cosmic acceleration). This model does not suffer from the horizon and flatness problems as in big bang cosmology, where a period of inflation that increases the size of our universe in more than 60 e-folds is needed in order to solve both problems. The model has two mechanisms to avoid these problems: the evolution of the universe through a contracting phase and a period of super inflation ( _ H> 0 )Peer Reviewed20132013-05-0120132013-11-25journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/20717https://dx.doi.org/10.1103/PhysRevD.87.104037reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/207172026-05-27T15:37:01Z
dc.title.none.fl_str_mv Bouncing loop quantum cosmology from F(T) gravity
title Bouncing loop quantum cosmology from F(T) gravity
spellingShingle Bouncing loop quantum cosmology from F(T) gravity
Amorós Torrent, Jaume|||0000-0002-3133-9985
Gravity
Cosmology
general relativity quantum cosmology
Gravetat
Cosmologia
Àrees temàtiques de la UPC::Matemàtiques i estadística
title_short Bouncing loop quantum cosmology from F(T) gravity
title_full Bouncing loop quantum cosmology from F(T) gravity
title_fullStr Bouncing loop quantum cosmology from F(T) gravity
title_full_unstemmed Bouncing loop quantum cosmology from F(T) gravity
title_sort Bouncing loop quantum cosmology from F(T) gravity
dc.creator.none.fl_str_mv Amorós Torrent, Jaume|||0000-0002-3133-9985
Haro Cases, Jaume|||0000-0002-5705-2405
Odintsov, Sergei D.
author Amorós Torrent, Jaume|||0000-0002-3133-9985
author_facet Amorós Torrent, Jaume|||0000-0002-3133-9985
Haro Cases, Jaume|||0000-0002-5705-2405
Odintsov, Sergei D.
author_role author
author2 Haro Cases, Jaume|||0000-0002-5705-2405
Odintsov, Sergei D.
author2_role author
author
dc.subject.none.fl_str_mv Gravity
Cosmology
general relativity quantum cosmology
Gravetat
Cosmologia
Àrees temàtiques de la UPC::Matemàtiques i estadística
topic Gravity
Cosmology
general relativity quantum cosmology
Gravetat
Cosmologia
Àrees temàtiques de la UPC::Matemàtiques i estadística
description The big bang singularity could be understood as a breakdown of Einstein’s general relativity at very high energies. By adopting this viewpoint, other theories that implement Einstein cosmology at high energies might solve the problem of the primeval singularity. One of them is loop quantum cosmology (LQC) with a small cosmological constant that models a universe moving along an ellipse, which prevents singularities like the big bang or the big rip, in the phase space ð H; Þ , where H is the Hubble parameter and the energy density of the universe. Using LQC one considers a model universe filled by radiation and matter where, due to the cosmological constant, there are a de Sitter and an anti–de Sitter solution. This means that one obtains a bouncing nonsingular universe which is in the contracting phase at early times. After leaving this phase, i.e., after bouncing, it passes trough a radiation- and matter-dominated phase and finally at late times it expands in an accelerated way (current cosmic acceleration). This model does not suffer from the horizon and flatness problems as in big bang cosmology, where a period of inflation that increases the size of our universe in more than 60 e-folds is needed in order to solve both problems. The model has two mechanisms to avoid these problems: the evolution of the universe through a contracting phase and a period of super inflation ( _ H> 0 )
publishDate 2013
dc.date.none.fl_str_mv 2013
2013-05-01
2013
2013-11-25
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/20717
https://dx.doi.org/10.1103/PhysRevD.87.104037
url https://hdl.handle.net/2117/20717
https://dx.doi.org/10.1103/PhysRevD.87.104037
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
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eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
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