Avoidance of future singularities in loop quantum cosmology

Simple item page
dc.creatorSami, M.
dc.creatorSingh, Parampreet
dc.creatorTsujikawa, Shinji
dc.date2006-05-21
dc.date.accessioned2026-07-07T10:24:19Z
dc.date.available2026-07-07T10:24:19Z
dc.descriptionWe consider the fate of future singularities in the effective dynamics of loop quantum cosmology. Non-perturbative quantum geometric effects which lead to $ρ^2$ modification of the Friedmann equation at high energies result in generic resolution of singularities whenever energy density $ρ$ diverges at future singularities of Friedmann dynamics. Such quantum effects lead to the avoidance of a Big Rip, which is followed by a recollapsing universe stable against perturbations. Resolution of sudden singularity, the case when pressure diverges but energy density approaches a finite value depends on the ratio of the latter to a critical energy density of the order of Planck. If the value of this ratio is greater than unity, the universe escapes the sudden future singularity and becomes oscillatory.
dc.description6 pages, 2 figures
dc.identifierhttps://arxiv.org/abs/gr-qc/0605113
dc.identifierhttp://arxiv.org/abs/gr-qc/0605113
dc.identifierPhys.Rev.D74:043514,2006
dc.identifierdoi:10.1103/PhysRevD.74.043514
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176141
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleAvoidance of future singularities in loop quantum cosmology
dc.typetext

Files

Collections

arXiv