Back Reaction And Local Cosmological Expansion Rate

Simple item page
dc.creatorGeshnizjani, Ghazal
dc.creatorBrandenberger, Robert
dc.date2002-04-23
dc.date.accessioned2026-07-07T11:29:56Z
dc.date.available2026-07-07T11:29:56Z
dc.descriptionWe calculate the back reaction of cosmological perturbations on a general relativistic variable which measures the local expansion rate of the Universe. Specifically, we consider a cosmological model in which matter is described by a single field. We analyze back reaction both in a matter dominated Universe and in a phase of scalar field-driven chaotic inflation. In both cases, we find that the leading infrared terms contributing to the back reaction vanish when the local expansion rate is measured at a fixed value of the matter field which is used as a clock, whereas they do not appear to vanish if the expansion rate is evaluated at a fixed value of the background time. We discuss possible implications for more realistic models with a more complicated matter sector.
dc.description7 pages, No figures
dc.identifierhttps://arxiv.org/abs/gr-qc/0204074
dc.identifierhttp://arxiv.org/abs/gr-qc/0204074
dc.identifierPhys.Rev.D66:123507,2002
dc.identifierdoi:10.1103/PhysRevD.66.123507
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/196876
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleBack Reaction And Local Cosmological Expansion Rate
dc.typetext

Files

Collections

arXiv