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gr-qc2008★ 20 cited
A Note on B-observables in Ponzano-Regge 3d Quantum Gravity
Etera R. Livine, James P. Ryan
We study the insertion and value of metric observables in the (discrete) path integral formulation of the Ponzano-Regge spinfoam model for 3d quantum gravity. In particular, we dis…
gr-qc2006
A new proposal for group field theory I: the 3d case
James Ryan
In this series of papers, we propose a new rendition of 3d and 4d state sum models based upon the group field theory (GFT) approach to non-perturbative quantum gravity. We will see…