Instanton transition in thermal and moduli deformed de Sitter cosmology

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dc.creatorKounnas, Costas
dc.creatorPartouche, Herve
dc.date2007-05-22
dc.date2007-11-03
dc.date.accessioned2026-07-07T11:16:16Z
dc.date.available2026-07-07T11:16:16Z
dc.descriptionWe consider the de Sitter cosmology deformed by the presence of a thermal bath of radiation and/or time-dependent moduli fields. Depending on the parameters, either a first or second order phase transition can occur. In the first case, an instanton allows a double analytic continuation. It induces a probability to enter the inflationary evolution by tunnel effect from another cosmological solution. The latter starts with a big bang and, in the case the transition does not occur, ends with a big crunch. A temperature duality exchanges the two cosmological branches. In the limit where the pure de Sitter universe is recovered, the tunnel effect reduces to a "creation from nothing", due to the vanishing of the big bang branch. However, the latter may be viable in some range of the deformation parameter. In the second case, there is a smooth evolution from a big bang to the inflationary phase.
dc.description35 pages, 10 eps figures
dc.identifierhttps://arxiv.org/abs/0705.3206
dc.identifierhttp://arxiv.org/abs/0705.3206
dc.identifierNucl.Phys.B793:131-159,2008
dc.identifierdoi:10.1016/j.nuclphysb.2007.10.008
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192618
dc.subjectHigh Energy Physics - Theory
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleInstanton transition in thermal and moduli deformed de Sitter cosmology
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