Asymptotics of 4d spin foam models

Details Asymptotics of 4d spin foam models Asymptotics of 4d spin foam models

2010-03-09

arxiv.org/abs/1003.1886v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, Proceedings for the 2nd Corfu summer school and workshop on quantum gravity and quantum geometry, talk given by Wins

Scientific paper

We study the asymptotic properties of four-simplex amplitudes for various four-dimensional spin foam models. We investigate the semi-classical limit of the Ooguri, Euclidean and Lorentzian EPRL models using coherent states for the boundary data. For some classes of geometrical boundary data, the asymptotic formulae are given, in all three cases, by simple functions of the Regge action for the four-simplex geometry.

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