Definition of a time variable with Entropy of a perfect fluid in Canonical Quantum Gravity
General Relativity and Quantum Cosmology
2009-07-30 v2
Abstract
The Brown-Kuchar mechanism is applied in the case of General Relativity coupled with the Schutz model for a perfect fluid. Using the canonical formalism and manipulating the set of modified constraints one is able to recover the definition of a time evolution operator, i.e. a physical Hamiltonian, expressed as a functional of gravitational variables and the entropy.
Keywords
Cite
@article{arxiv.0807.3281,
title = {Definition of a time variable with Entropy of a perfect fluid in Canonical Quantum Gravity},
author = {Francesco Cianfrani and Giovanni Montani and Simone Zonetti},
journal= {arXiv preprint arXiv:0807.3281},
year = {2009}
}
Comments
13 pages, no figures. To be published in Classical and Quantum Gravity. v2: major changes