Stochastic semiclassical cosmological models

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dc.creatorCalzetta, E.
dc.creatorCampos, A.
dc.creatorVerdaguer, E.
dc.date1997-04-04
dc.date.accessioned2026-07-07T11:08:44Z
dc.date.available2026-07-07T11:08:44Z
dc.descriptionWe consider the classical stochastic fluctuations of spacetime geometry induced by quantum fluctuations of massless non-conformal matter fields in the Early Universe. To this end, we supplement the stress-energy tensor of these fields with a stochastic part, which is computed along the lines of the Feynman-Vernon and Schwinger-Keldysh techniques; the Einstein equation is therefore upgraded to a so called Einstein-Langevin equation. We consider in some detail the conformal fluctuations of flat spacetime and the fluctuations of the scale factor in a simple cosmological modelintroduced by Hartle, which consists of a spatially flat isotropic cosmology driven by radiation and dust.
dc.description29 pages, no figures, ReVTeX file
dc.identifierhttps://arxiv.org/abs/gr-qc/9704010
dc.identifierhttp://arxiv.org/abs/gr-qc/9704010
dc.identifierPhys.Rev.D56:2163-2172,1997
dc.identifierdoi:10.1103/PhysRevD.56.2163
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190234
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleStochastic semiclassical cosmological models
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