Cosmology from a running vacuum model driven by a scalar field

Autor(es)

Santos, J. R. L. ^[1] ; Moraes, P. H. R. S. ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Fed Campina Grande, Unidade Acad Fis, BR-58429900 Campina Grande, PB - Brazil

^[2] ITA, Dept Fis, BR-2228900 Sao Jose Dos Campos, SP - Brazil

^[3] Univ Napoli Federico II UNINA, Dept Phys, I-80126 Naples - Italy

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS; v. 17, n. 1 JAN 2020.
• Citações Web of Science: 0

Resumo

The possibility that the vacuum energy density rho(Lambda) is, indeed, varying in time, has been investigated lately from the running vacuum models perspective. Motivated by such models, in this work, we relate the decaying vacuum energy rho(Lambda) (t) with a scalar field (phi). We derive the equations of motion from such a premise and implement the first-order formalism in order to obtain analytical solutions to the cosmological parameters. We show that these are in agreement with recent Planck observational data. We discuss the physical consequences of having rho(Lambda) (t) related to phi. (AU)

• Processo FAPESP: 15/08476-0 - Ondas gravitacionais em teorias f(R,T): estados de polarização e fontes astrofísicas
• Beneficiário: Pedro Henrique Ribeiro da Silva Moraes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado