Complete LQG propagator. II. Asymptotic behavior of the vertex

Journal Article · Fri Feb 15 00:00:00 EST 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.77.044024· OSTI ID:21039144

Alesci, Emanuele ^[1]; Rovelli, Carlo ^[2]

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1. Dipartimento di Fisica, Universita di Roma Tre, I-00146 Rome (Italy)
2. Centre de Physique Theorique de Luminy, Universite de la Mediterranee, F-13288 Marseille (France)

In a previous article we have shown that there are difficulties in obtaining the correct graviton propagator from the loop-quantum-gravity dynamics defined by the Barrett-Crane vertex amplitude. Here we show that a vertex amplitude that depends nontrivially on the intertwiners can yield the correct propagator. We give an explicit example of asymptotic behavior of a vertex amplitude that gives the correct full graviton propagator in the large distance limit.

• OSTI ID: 21039144
• Journal Information: Physical Review. D, Particles Fields, Vol. 77, Issue 4; Other Information: DOI: 10.1103/PhysRevD.77.044024; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ASYMPTOTIC SOLUTIONS
DISTANCE
GRAVITONS
PROPAGATOR
QUANTUM GRAVITY