Nonsingular origin of the universe and the cosmological constant problem

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We consider a nonsingular origin for the universe starting from an Einstein static universe in the framework of a theory which uses two volume elements √-gd 4x and Φd 4x, 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 nonsingular 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
Pages (from-to)2767-2771
Number of pages5
JournalInternational Journal of Modern Physics D
Issue number14
StatePublished - 31 Dec 2011


  • Nonsingular cosmologies
  • cosmological constant problem
  • emergent universe scenarios
  • two measures theories

ASJC Scopus subject areas

  • Mathematical Physics
  • Astronomy and Astrophysics
  • Space and Planetary Science


Dive into the research topics of 'Nonsingular origin of the universe and the cosmological constant problem'. Together they form a unique fingerprint.

Cite this