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Nonsingular instantons for the creation of open universes

AuthorsGonzález-Díaz, Pedro F.
Keywords[PACS] Quantum gravity
[PACS] Particle-theory and field-theory models of the early Universe
Issue Date1999
PublisherAmerican Physical Society
CitationPhysical Review D - Particles, Fields, Gravitation and Cosmology 59: 1- 7 (1999)
AbstractWe show that the instability of the singular Vilenkin instanton describing the creation of an open universe can be avoided using, instead of a minimally coupled scalar field, an axionic massless scalar field which gives rise to the Giddings-Strominger instanton. However, if we replace the singularity of the Hawking-Turok instanton for an axionic wormhole some interpretational and technical difficulties would appear which can be overcome by introducing a positive cosmological constant in the action. This would make the instanton finite and free from any instabilities. ©1999 The American Physical Society.
Identifiersdoi: 10.1103/PhysRevD.59.043509
issn: 0556-2821
Appears in Collections:(CFMAC-IFF) Artículos
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