Causality and matter propagation in 3d spin foam quantum gravity

Simple item page
dc.creatorOriti, Daniele
dc.creatorTlas, Tamer
dc.date2006-08-27
dc.date2006-09-23
dc.date.accessioned2026-07-07T10:24:28Z
dc.date.available2026-07-07T10:24:28Z
dc.descriptionIn this paper we tackle the issue of causality in quantum gravity, in the context of 3d spin foam models. We identify the correct procedure for implementing the causality/orientation dependence restriction that reduces the path integral for BF theory to that of quantum gravity in first order form. We construct explicitly the resulting causal spin foam model. We then add matter degrees of freedom to it and construct a causal spin foam model for 3d quantum gravity coupled to matter fields. Finally, we show that the corresponding spin foam amplitudes admit a natural approximation as the Feynman amplitudes of a non-commutative quantum field theory, with the appropriate Feynman propagators weighting the lines of propagation, and that this effective field theory reduces to usual QFT in flat space in the no-gravity limit.
dc.descriptionv2: 26 pages, 2 figures, RevTeX, some typos and some formulae corrected with no relevant change for the results, one reference added
dc.identifierhttps://arxiv.org/abs/gr-qc/0608116
dc.identifierhttp://arxiv.org/abs/gr-qc/0608116
dc.identifierPhys.Rev.D74:104021,2006
dc.identifierdoi:10.1103/PhysRevD.74.104021
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176196
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleCausality and matter propagation in 3d spin foam quantum gravity
dc.typetext

Files

Collections

arXiv