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dc.contributor.authorGonzález-Díaz, Pedro F.-
dc.date.accessioned2014-07-24T08:23:31Z-
dc.date.available2014-07-24T08:23:31Z-
dc.date.issued1999-
dc.identifierdoi: 10.1103/PhysRevD.59.043509-
dc.identifierissn: 0556-2821-
dc.identifier.citationPhysical Review D - Particles, Fields, Gravitation and Cosmology 59: 1- 7 (1999)-
dc.identifier.urihttp://hdl.handle.net/10261/100431-
dc.description.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.-
dc.description.sponsorshipThis reasearch was supported by DCICYT under Research Project No. PB94-0107.-
dc.publisherAmerican Physical Society-
dc.rightsopenAccess-
dc.subject[PACS] Quantum gravity-
dc.subject[PACS] Particle-theory and field-theory models of the early Universe-
dc.titleNonsingular instantons for the creation of open universes-
dc.typeartículo-
dc.identifier.doi10.1103/PhysRevD.59.043509-
dc.date.updated2014-07-24T08:23:31Z-
dc.description.versionPeer Reviewed-
dc.language.rfc3066eng-
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