Loop Quantum Gravity and the Cyclic Universe

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dc.creatorBojowald, Martin
dc.creatorMaartens, Roy
dc.creatorSingh, Parampreet
dc.date2004-07-14
dc.date2004-09-23
dc.date.accessioned2026-07-07T04:17:11Z
dc.date.available2026-07-07T04:17:11Z
dc.descriptionLoop quantum gravity introduces strong non-perturbative modifications to the dynamical equations in the semi-classical regime, which are responsible for various novel effects, including resolution of the classical singularity in a Friedman universe. Here we investigate the modifications for the case of a cyclic universe potential, assuming that we can apply the four-dimensional loop quantum formalism within the effective four-dimensional theory of the cyclic scenario. We find that loop quantum effects can dramatically alter the near-collision dynamics of the cyclic scenario. In the kinetic-dominated collapse era, the scalar field is effectively frozen by loop quantum friction, so that the branes approach collision and bounce back without actual collision.
dc.description6 pages, 4 figures; v2: minor changes to match PRD version
dc.identifierhttps://arxiv.org/abs/hep-th/0407115
dc.identifierhttp://arxiv.org/abs/hep-th/0407115
dc.identifierPhys.Rev. D70 (2004) 083517
dc.identifierdoi:10.1103/PhysRevD.70.083517
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/52649
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleLoop Quantum Gravity and the Cyclic Universe
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