Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2009-02-06
J.Math.Phys.50:112504,2009
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
v2: improved presentation, typos corrected, refs added; results unchanged
Scientific paper
10.1063/1.3244218
The semiclassical limit of a 4-simplex amplitude for a spin foam quantum gravity model with an Immirzi parameter is studied. If the boundary state represents a non-degenerate 4-simplex geometry, the asymptotic formula contains the Regge action for general relativity. A canonical choice of phase for the boundary state is introduced and is shown to be necessary to obtain the results.
Barrett John W.
Dowdall Richard J.
Fairbairn Winston J.
Gomes Henrique
Hellmann Frank
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