Consistent Canonical Quantization of Gravity: Recovery of Classical GR from BRST-invariant Coherent States
This paper presents a consistent canonical quantization of General Relativity within a BRST-invariant framework around the Minkowski vacuum, demonstrating that classical spacetime geometries emerge as coherent states where the vanishing Hamiltonian constraint is realized as an expectation value, thereby enabling non-trivial time evolution for correlation functions and providing motivation for spontaneously broken supersymmetry.