4 papers · 1 filter
Square Root Actions, Metric Signature, and the Path-Integral of Quantum Gravity
A. Carlini, J. Greensite
We consider quantization of the Baierlein-Sharp-Wheeler form of the gravitational action, in which the lapse function is determined from the Hamiltonian constraint. This action has…
Fundamental Constants and the Problem of Time
A. Carlini, J. Greensite
We point out that for a large class of parametrized theories, there is a constant in the constrained Hamiltonian which drops out of the classical equations of motion in configurati…
The Dispersion of Newton's Constant: A Transfer Matrix Formulation of Quantum Gravity
J. Greensite
A transfer matrix formalism applicable to certain reparametrization invariant theories, including quantum gravity, is proposed. In this formulation it is found that every stationar…
Why is Spacetime Lorentzian?
A. Carlini, J. Greensite
We expand on the idea that spacetime signature should be treated as a dynamical degree of freedom in quantum field theory. It has been argued that the probability distribution for…