INVESTIGADORES
MEMBIELA Federico Agustin
artículos
Título:
Quintessential inflation from a variable cosmological constant in a 5D vacuum
Autor/es:
AGUSTIN, MEMBIELA; MAURICIO, BELLINI
Revista:
PHYSICS LETTERS B
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2006 vol. 641 p. 125 - 129
ISSN:
0370-2693
Resumen:
We explore an effective 4D cosmological model for the universe where the variable cosmological
constant governs its evolution and the pressure remains negative along all the expansion. This
model is introduced from a 5D vacuum state where the (space-like) extra coordinate is considered as
noncompact. The expansion is produced by the inflaton field, which is considered as nonminimally
coupled to gravity. We conclude from experimental data that the coupling of the inflaton with
gravity should be weak, but variable in different epochs of the evolution of the universe.