Towards the graviton from spinfoams: Higher order corrections in the 3D toy model
Towards the graviton from spinfoams: Higher order corrections in the 3D toy model
We consider the recent calculation by Rovelli of the graviton propagator in the spinfoam formalism. Within the 3D toy model introduced by Speziale, we test how the spinfoam formalism can be used to construct the perturbative expansion of graviton amplitudes. Although the 3D graviton is a pure gauge, one can …