The complete LQG propagator: II. Asymptotic behavior of the vertex

Details The complete LQG propagator: II. Asymptotic behavior of the vertex The complete LQG propagator: II. Asymptotic behavior of the vertex

2007-11-08

arxiv.org/abs/0711.1284v1

Phys.Rev.D77:044024,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

16 pages

Scientific paper

10.1103/PhysRevD.77.044024

In a previous article we have show 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.

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