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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/7318
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dc.contributor.authorVaradarajan, Madhavan-
dc.date.accessioned2019-10-16T06:52:06Z-
dc.date.available2019-10-16T06:52:06Z-
dc.date.issued2019-09-15-
dc.identifier.citationPhysical Review D, 2019, Vol.100, p066018en_US
dc.identifier.issn2470-0010-
dc.identifier.issn2470-0029 (online)-
dc.identifier.urihttp://hdl.handle.net/2289/7318-
dc.descriptionOpen Accessen_US
dc.description.abstractTwo desirable properties of a quantum dynamics for loop quantum gravity (LQG) are that its generators provide an anomalyfree representation of the classical constraint algebra and that physical states which lie in the kernel of these generators encode propagation. A physical state in LQG is expected to be a sum over graphical S U (2 ) spin network states. By propagation we mean that a quantum perturbation at one vertex of a spin network state propagates to vertices which are "many links away" thus yielding a new spin network state which is related to the old one by this propagation. A physical state encodes propagation if its spin network summands are related by propagation. Here we study propagation in an LQG quantization of Smolin's weak coupling limit of Euclidean gravity based on graphical U (1 )3 "charge" network states. Building on our earlier work on anomalyfree quantum constraint actions for this system, we analyse the extent to which physical states encode propagation. In particular, we show that a slight modification of the constraint actions constructed in our previous work leads to physical states which encode robust propagation. Under appropriate conditions, this propagation merges, separates and entangles vertices of charge network states. The "electric" diffeomorphism constraints introduced in previous work play a key role in our considerations. The main import of our work is that there are choices of quantum constraint constructions through LQG methods which are consistent with vigorous propagation thus providing a counterpoint to Smolin's early observations on the difficulties of propagation in the context of LQG type operator constructions. Whether the choices considered in this work are physically appropriate is an open question worthy of further study.en_US
dc.language.isoenen_US
dc.publisherAmerican Physical Societyen_US
dc.relation.urihttps://arxiv.org/abs/1904.02247en_US
dc.relation.urihttps://doi.org/10.1103/PhysRevD.100.066018en_US
dc.relation.urihttps://ui.adsabs.harvard.edu/abs/2019PhRvD.100f6018V/abstracten_US
dc.rights2019 American Physical Societyen_US
dc.subjectGeneral Relativity and Quantum Cosmologyen_US
dc.subjectHigh Energy Physics - Theoryen_US
dc.titleQuantum propagation in Smolin’s weak coupling limit of 4D Euclidean gravityen_US
dc.typeArticleen_US
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