Non singular origin of the universe and its connection to the cosmological constant problem (CCP)

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Abstract

We consider a non singular origin for the Universe starting from an Einstein static Universe in the framework of a theory which uses two volume elements sqrt −gd4 x and ϕd4 x, where ϕ is a metric independent density, also curvature, curvature square terms, first order formalism and for scale invariance a dilaton field ϕ are considered in the action. In the Einstein frame we also add a cosmological term that parametrizes the zero point fluctuations. The resulting effective potential for the dilaton contains two flat regions, for ϕ→∞ relevant for the non singular origin of the Universe and ϕ→ −∞, describing our present Universe. Surprisingly, avoidance of singularities and stability as ϕ→∞ imply a positive but small vacuum energy as ϕ→ −∞.Zero vacuum energy density for the present universe is the “threshold” for universe creation.

Original languageEnglish
Title of host publicationAccelerated Cosmic Expansion - Proceedings of the 4th International Meeting On Gravitation and Cosmology
EditorsClaudia Moreno González, José Edgar Madriz Aguilar, Luz Marina Reyes Barrera, Claudia Moreno González, José Edgar Madriz Aguilar, Luz Marina Reyes Barrera
PublisherKluwer Academic Publishers
Pages85-94
Number of pages10
ISBN (Electronic)9783319020624, 9783319020624
DOIs
StatePublished - 1 Jan 2014
Event4th International Meeting On Gravitation and Cosmology, 2012 - Guadalajara, Mexico
Duration: 21 May 201225 May 2012

Publication series

NameAstrophysics and Space Science Proceedings
Volume38
ISSN (Print)1570-6591
ISSN (Electronic)1570-6605

Conference

Conference4th International Meeting On Gravitation and Cosmology, 2012
Country/TerritoryMexico
CityGuadalajara
Period21/05/1225/05/12

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