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arXiv · 0904.0521

Fluid Entropy as Time-Variable in Canonical Quantum Gravity

Francesco Cianfrani·Giovanni Montani·Simone Zonetti
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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.

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Francesco Cianfrani, Giovanni Montani, Simone Zonetti. 2009-04-07. Fluid Entropy as Time-Variable in Canonical Quantum Gravity. https://arxiv.org/abs/0904.0521

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