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Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Carneiro, Saulo | - |
dc.creator | Carneiro, Saulo | - |
dc.date.accessioned | 2013-08-16T12:53:44Z | - |
dc.date.issued | 2006 | - |
dc.identifier.issn | 0218-2718 | - |
dc.identifier.uri | http://www.repositorio.ufba.br/ri/handle/ri/12592 | - |
dc.description | P.1-7 | pt_BR |
dc.description.abstract | A 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. | pt_BR |
dc.language.iso | en | pt_BR |
dc.publisher | International Journal of Modern Physics D | pt_BR |
dc.source | http://dx.doi.org/10.1142/S0218271806009510 | pt_BR |
dc.subject | Inflation | pt_BR |
dc.subject | Dark energy | pt_BR |
dc.subject | Vacuum decay | pt_BR |
dc.title | From de sitter to de sitter: a non-singular inflationary universe driven by vacuum | pt_BR |
dc.type | Artigo de Periódico | pt_BR |
dc.identifier.number | v.15 n. 12 | pt_BR |
dc.embargo.liftdate | 10000-01-01 | - |
Aparece nas coleções: | Artigo Publicado em Periódico (FIS) |
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S0218271806009510.pdf Restricted Access | 152,83 kB | Adobe PDF | Visualizar/Abrir Solicitar uma cópia |
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