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Titolo:
Long range correlations in quantum gravity - art. no. 044032
Autore:
Neville, DE;
Indirizzi:
Temple Univ, Dept Phys, Philadelphia, PA 19122 USA Temple Univ Philadelphia PA USA 19122 pt Phys, Philadelphia, PA 19122 USA
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 4, volume: 5904, anno: 1999,
pagine: 4032 -
SICI:
0556-2821(19990215)5904:4<4032:LRCIQG>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPIN DYNAMICS QSD; VOLUME OPERATOR; MATRIX-ELEMENTS; LOOP SPACE; REPRESENTATION; QUANTIZATION; CONNECTIONS; CONSTRAINT; GEOMETRY; NETWORKS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Neville, DE Temple Univ, Dept Phys, Philadelphia, PA 19122 USA Temple Univ Philadelphia PA USA 19122 ladelphia, PA 19122 USA
Citazione:
D.E. Neville, "Long range correlations in quantum gravity - art. no. 044032", PHYS REV D, 5904(4), 1999, pp. 4032

Abstract

Smolin has pointed out that the spin network formulation of quantum gravity will not necessarily possess the long range correlations needed for a proper classical limit, typically, the action of the scalar constraint is too local. Thiemann's length operator is used to argue for a further restriction on the action of the scalar constraint: it should not introduce new edgesof color unity into a spin network, but should rather change preexisting edges by +/- one unit of color. Smolin has proposed a specific ansatz for a correlated scalar constraint. This ansatz does not introduce color unity edges, but the [scalar, scalar] commutator is shown to be anomalous. In general, it will be hard to avoid anomalies, once correlation is introduced intothe constraint, but it is argued that the scalar constraint may not need to be anomaly-free when acting on the kinematic basis. [S0556-2821(99)07704-8].

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Documento generato il 02/04/20 alle ore 00:07:44