Quantum reduced loop gravity: extension to gauge vector field
  Within the framework of Quantum Reduced Loop Gravity we quantize the Hamiltonian for a gauge vector field. The regularization can be performed using tools analogous to the ones adopted in full Loop Quantum Gravity, while the matrix elements of the resulting operator between basis states are analytic coefficients. This analysis is the first step towards deriving the full quantum gravity corrections to the vector field semiclassical dynamics. 
Jakub Bilski, Emanuele Alesci, Francesco Cianfrani, Pietro Don\`a,   Antonino Marciano
gr-qc