Fluid Entropy as Time-Variable in Canonical Quantum Gravity

2009/04/03 by Francesco Cianfrani, Giovanni Montani, Cianfrani, Francesco +3
Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Noncommutative and Quantum Gravity Theories #Relativity and Gravitational Theory #gr-qc

paper · pdf · doi:10.48550/arxiv.0904.0521

5 pages, Proceedings of The 3rd Stueckelberg Workshop on Relativistic Field Theories

openalex publication_date 2009/04/03 · arxiv created 2009/04/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The Brown-Kuchař 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.

Citations

• Quantization of Gauge Systems

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