LQG propagator from the new spin foams

Eugenio Bianchi (1, 2) , Elena Magliaro (1, 2) , Claudio Perini (1, 2)

1 CPT - Centre de Physique Théorique - UMR 6207
2 CPT - Centre de Physique Théorique - UMR 7332

We compute metric correlations in loop quantum gravity with the dynamics defined by the new spin foam models. The analysis is done at the lowest order in a vertex expansion and at the leading order in a large spin expansion. The result is compared to the graviton propagator of perturbative quantum gravity.

Domaines: Relativité Générale et Cosmologie Quantique [gr-qc]

Eugenio Bianchi, Elena Magliaro, Claudio Perini. LQG propagator from the new spin foams. Nuclear Physics B, 2009, 822 (1-2), pp.245-269. ⟨10.1016/j.nuclphysb.2009.07.016⟩. ⟨hal-00402065⟩