Energy-Momentum Tensor of Cosmological Fluctuations during Inflation

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dc.creatorFinelli, F.
dc.creatorMarozzi, G.
dc.creatorVacca, G. P.
dc.creatorVenturi, G.
dc.date2003-10-16
dc.date2004-03-29
dc.date.accessioned2026-07-07T11:42:55Z
dc.date.available2026-07-07T11:42:55Z
dc.descriptionWe study the renormalized energy-momentum tensor (EMT) of cosmological scalar fluctuations during the slow-rollover regime for chaotic inflation with a quadratic potential and find that it is characterized by a negative energy density which grows during slow-rollover. We also approach the back-reaction problem as a second-order calculation in perturbation theory finding no evidence that the back-reaction of cosmological fluctuations is a gauge artifact. In agreement with the results on the EMT, the average expansion rate is decreased by the back-reaction of cosmological fluctuations.
dc.description19 pages, no figures.An appendix and references added, conclusions unchanged, version accepted for publication in PRD
dc.identifierhttps://arxiv.org/abs/gr-qc/0310086
dc.identifierhttp://arxiv.org/abs/gr-qc/0310086
dc.identifierPhys.Rev.D69:123508,2004
dc.identifierdoi:10.1103/PhysRevD.69.123508
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201059
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleEnergy-Momentum Tensor of Cosmological Fluctuations during Inflation
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