Extended metastable dark energy

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorLima, J. A. S.-
Autor(es): dc.creatorZilioti, G. J. M.-
Autor(es): dc.creatorBrito, L. C. T.-
Data de aceite: dc.date.accessioned2026-02-09T12:13:47Z-
Data de disponibilização: dc.date.available2026-02-09T12:13:47Z-
Data de envio: dc.date.issued2021-09-23-
Data de envio: dc.date.issued2021-09-23-
Data de envio: dc.date.issued2020-11-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/48233-
Fonte completa do material: dc.identifierhttps://doi.org/10.1016/j.dark.2020.100713-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1157079-
Descrição: dc.descriptionThe metastable dark energy scenario is revisited by assuming that the current false vacuum energy density is the remnant from a primeval inflationary stage. The zero temperature scalar field potential is here described by an even power series up to order six which depends on 3 free parameters: the mass of the scalar field (m), the dimensionless (λ) specifying the standard self-interaction term, and a free cutoff mass scale (M) quantifying all possible deviations from the degenerate false vacuum state. The current ΛCDM model is a consequence of the very long decay time of the false vacuum which although finite is much greater than the current age of the Universe. This result remains valid for arbitrary combinations of the m/M ratio which can analytically be determined in the thin-wall approximation and numerically calculated outside this limit. Unlike many claims in the literature the vacuum dominance may be temporary. The finiteness of the decay time suggests that the ultimate stage of the observed Universe in such a scenario will not be driven by a de Sitter type cosmology.-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourcePhysics of the Dark Universe-
Palavras-chave: dc.subjectDark energy-
Palavras-chave: dc.subjectVacuum decay-
Palavras-chave: dc.subjectCosmological constant-
Palavras-chave: dc.subjectEnergia escura metaestável-
Palavras-chave: dc.subjectDecadência do vácuo-
Palavras-chave: dc.subjectConstante cosmológica-
Título: dc.titleExtended metastable dark energy-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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