TY - GEN

T1 - Non singular origin of the universe and its connection to the cosmological constant problem (CCP)

AU - Guendelman, E. I.

N1 - Publisher Copyright:
© Springer International Publishing Switzerland 2014.

PY - 2014/1/1

Y1 - 2014/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84927652837&partnerID=8YFLogxK

U2 - 10.1007/978-3-319-02063-1_7

DO - 10.1007/978-3-319-02063-1_7

M3 - Conference contribution

AN - SCOPUS:84927652837

T3 - Astrophysics and Space Science Proceedings

SP - 85

EP - 94

BT - Accelerated Cosmic Expansion - Proceedings of the 4th International Meeting On Gravitation and Cosmology

A2 - Moreno González, Claudia

A2 - Madriz Aguilar, José Edgar

A2 - Reyes Barrera, Luz Marina

A2 - Moreno González, Claudia

A2 - Madriz Aguilar, José Edgar

A2 - Reyes Barrera, Luz Marina

PB - Kluwer Academic Publishers

T2 - 4th International Meeting On Gravitation and Cosmology, 2012

Y2 - 21 May 2012 through 25 May 2012

ER -