Stability of de Sitter spacetime under isotropic perturbations in semiclassical gravity

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dc.creatorPerez-Nadal, Guillem
dc.creatorRoura, Albert
dc.creatorVerdaguer, Enric
dc.date2007-12-14
dc.date.accessioned2026-07-07T11:54:39Z
dc.date.available2026-07-07T11:54:39Z
dc.descriptionA spatially flat Robertson-Walker spacetime driven by a cosmological constant is non-conformally coupled to a massless scalar field. The equations of semiclassical gravity are explicitly solved for this case, and a self-consistent de Sitter solution associated with the Bunch-Davies vacuum state is found (the effect of the quantum field is to shift slightly the effective cosmological constant). Furthermore, it is shown that the corrected de Sitter spacetime is stable under spatially-isotropic perturbations of the metric and the quantum state. These results are independent of the free renormalization parameters.
dc.description19 pages, REVTeX4
dc.identifierhttps://arxiv.org/abs/0712.2282
dc.identifierhttp://arxiv.org/abs/0712.2282
dc.identifierPhys.Rev.D77:124033,2008
dc.identifierdoi:10.1103/PhysRevD.77.124033
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204981
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleStability of de Sitter spacetime under isotropic perturbations in semiclassical gravity
dc.typetext

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