Stable cosmological models driven by a free quantum scalar field

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dc.creatorDappiaggi, Claudio
dc.creatorFredenhagen, Klaus
dc.creatorPinamonti, Nicola
dc.date2008-01-18
dc.date2008-02-01
dc.date.accessioned2026-07-07T11:39:56Z
dc.date.available2026-07-07T11:39:56Z
dc.descriptionIn the mathematically rigorous analysis of semiclassical Einstein's equations, the renormalisation of the stress-energy tensor plays a crucial role. We address such a topic in the case of a scalar field with both arbitrary mass and coupling with gravity in the hypothesis that the underlying algebraic quantum state is of Hadamard type. Particularly, if we focus on highly symmetric solutions of the semiclassical Einstein's equations, the envisaged method displays a de Sitter type behaviour even without an a priori introduced cosmological constant. As a further novel result we shall show that these solutions turn out to be stable.
dc.description8 pages, 1 figure and revtex. Comments and references added
dc.identifierhttps://arxiv.org/abs/0801.2850
dc.identifierhttp://arxiv.org/abs/0801.2850
dc.identifierPhys.Rev.D77:104015,2008
dc.identifierdoi:10.1103/PhysRevD.77.104015
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/200099
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleStable cosmological models driven by a free quantum scalar field
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