Classical and Quantum Gravity
Institute of Physics
We give an explicit characterization of all functions on the phase space for the polarized Gowdy 3-torus spacetimes which have weakly vanishing Poisson brackets with the Hamiltonian and momentum constraint functions.
C.G. Torre, “Observables for the polarized Gowdy model,” Classical and Quantum Gravity, vol. 23(5), 2006, pp. 1543-1555.