The Brown-Kucha mechanism is applied in the case of general relativity coupled with 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. © 2009 IOP Publishing Ltd.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)
Cianfrani, F., Montani, G., & Zonetti, S. (2009). Definition of a time variable with entropy of a perfect fluid in canonical quantum gravity. Classical and Quantum Gravity, 26(12), -. . https://doi.org/10.1088/0264-9381/26/12/125002