The physical boundary Hilbert space and volume operator in the Lorentzian new spin-foam theory
The physical boundary Hilbert space and volume operator in the Lorentzian new spin-foam theory
A covariant spin-foam formulation of quantum gravity has been recently developed, characterized by a kinematics which appears to match well the one of canonical loop quantum gravity.In this paper we reconsider the implementation of the constraints that defines the model.We define in a simple way the boundary Hilbert space of …