Definition of a time variable with entropy of a perfect fluid in canonical quantum gravity

The Brown-Kuchar 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,...

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Bibliographic Details
Published in:Classical and quantum gravity 2009-06, Vol.26 (12), p.125002-125002 (10)
Main Authors: Cianfrani, Francesco, Montani, Giovanni, Zonetti, Simone
Format: Article
Language:English
Subjects:
Exact sciences and technology
General relativity and gravitation
Physics
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Summary:The Brown-Kuchar 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.
ISSN:0264-9381
1361-6382
DOI:10.1088/0264-9381/26/12/125002