From de sitter to de sitter: a non-singular inflationary universe driven by vacuum

Detalhes bibliográficos
Autor(a) principal: Carneiro, Saulo
Data de Publicação: 2006
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/12592
Resumo: P.1-7
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spelling Carneiro, SauloCarneiro, Saulo2013-08-16T12:53:44Z20060218-2718http://www.repositorio.ufba.br/ri/handle/ri/12592v.15 n. 12P.1-7A semi-classical analysis of vacuum energy in the expanding space–time suggests that the cosmological term decays with time, with a concomitant matter production. For early times we find, in Planck units, Λ ≈ H4, where H is the Hubble parameter. The corresponding cosmological solution has no initial singularity, existing since an infinite past. During an infinitely long period we have a quasi-de Sitter, inflationary universe, with H ≈ 1. However, at a given time, the expansion undertakes a phase transition, with H and Λ decreasing to nearly zero in a few Planck times, producing a huge amount of radiation. On the other hand, the late-time scenario is similar to the standard model, with the radiation phase followed by a dust era, which tends asymptotically to a de Sitter universe, with vacuum dominating again.Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2013-06-14T12:26:33Z No. of bitstreams: 1 S0218271806009510.pdf: 156498 bytes, checksum: 936d5ee757b53d12e2783b38841f9d32 (MD5)Approved for entry into archive by Rodrigo Meirelles(rodrigomei@ufba.br) on 2013-08-16T12:53:44Z (GMT) No. of bitstreams: 1 S0218271806009510.pdf: 156498 bytes, checksum: 936d5ee757b53d12e2783b38841f9d32 (MD5)Made available in DSpace on 2013-08-16T12:53:44Z (GMT). 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dc.title.pt_BR.fl_str_mv From de sitter to de sitter: a non-singular inflationary universe driven by vacuum
title From de sitter to de sitter: a non-singular inflationary universe driven by vacuum
spellingShingle From de sitter to de sitter: a non-singular inflationary universe driven by vacuum
Carneiro, Saulo
Inflation
Dark energy
Vacuum decay
title_short From de sitter to de sitter: a non-singular inflationary universe driven by vacuum
title_full From de sitter to de sitter: a non-singular inflationary universe driven by vacuum
title_fullStr From de sitter to de sitter: a non-singular inflationary universe driven by vacuum
title_full_unstemmed From de sitter to de sitter: a non-singular inflationary universe driven by vacuum
title_sort From de sitter to de sitter: a non-singular inflationary universe driven by vacuum
author Carneiro, Saulo
author_facet Carneiro, Saulo
author_role author
dc.contributor.author.fl_str_mv Carneiro, Saulo
Carneiro, Saulo
dc.subject.por.fl_str_mv Inflation
Dark energy
Vacuum decay
topic Inflation
Dark energy
Vacuum decay
description P.1-7
publishDate 2006
dc.date.issued.fl_str_mv 2006
dc.date.accessioned.fl_str_mv 2013-08-16T12:53:44Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/12592
dc.identifier.issn.none.fl_str_mv 0218-2718
dc.identifier.number.pt_BR.fl_str_mv v.15 n. 12
identifier_str_mv 0218-2718
v.15 n. 12
url http://www.repositorio.ufba.br/ri/handle/ri/12592
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv International Journal of Modern Physics D
publisher.none.fl_str_mv International Journal of Modern Physics D
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1142/S0218271806009510
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
instacron:UFBA
instname_str Universidade Federal da Bahia (UFBA)
instacron_str UFBA
institution UFBA
reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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