Observables in 3d spinfoam quantum gravity with fermions

Understand

We study expectation values of observables in three-dimensional spinfoam quantum gravity coupled to Dirac fermions.

• We revisit the model introduced by one of the authors and extend it to the case of massless fermionic fields.
• We introduce observables, analyse their symmetries and the corresponding proper gauge fixing.
• The Berezin integral over the fermionic fields is performed and the fermionic observables are expanded in open paths and closed loops associated to pure quantum gravity observables.