Use este identificador para citar ou linkar para este item:
https://repositorio.ufba.br/handle/ri/14674
Tipo: | Artigo de Periódico |
Título: | Non-singular inflation with vacuum decay |
Título(s) alternativo(s): | Journal of Physics A: Mathematical and Theoretical |
Autor(es): | Carneiro, Saulo |
Autor(es): | Carneiro, Saulo |
Abstract: | On the basis of a semi-classical analysis of vacuum energy in an expanding spacetime, we describe a non-singular cosmological model in which the vacuum density decays with time, with a concomitant production of matter. During an infinitely long period we have an empty, inflationary universe, with H ≈ 1. This primordial era ends in a fast phase transition, during which H and Λ decrease to nearly zero in a few Planck times, with the release of a huge amount of radiation. The late-time scenario is similar to the standard model, with the radiation phase followed by a long dust era, which tends asymptotically to a de Sitter universe, with vacuum dominating again. An analysis of the redshift-distance relation for supernovae Ia leads to cosmological parameters in agreement with other current estimations. |
Tipo de Acesso: | Acesso Aberto |
URI: | http://repositorio.ufba.br/ri/handle/ri/14674 |
Data do documento: | 2007 |
Aparece nas coleções: | Artigo Publicado em Periódico (FIS) |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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1751-8121_40_25_S28.pdf | 256 kB | Adobe PDF | Visualizar/Abrir |
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