General relativity as classical limit of evolutionary quantum gravity

Giovanni Montani, Francesco Cianfrani

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6 Citations (Scopus)

Abstract

We analyze the dynamics of the gravitational field when the covariance is restricted to a synchronous gauge. In the spirit of the Noether theorem, we determine the conservation law associated with the Lagrangian invariance and outline that non-vanishing behaviour of the Hamiltonian comes out. We then interpret such resulting non-zero 'energy' of the gravitational field in terms of a dust fluid. This new matter contribution is co-moving to the slicing and it accounts for the 'materialization' of a synchronous reference from the corresponding gauge condition. Furthermore, we analyze the quantum dynamics of a generic inhomogeneous universe as described by this evolutionary scheme, asymptotically to the singularity. We show how the phenomenology of such a model overlaps the corresponding Wheeler-DeWitt picture. Finally, we study the possibility of a Schrödinger dynamics of the gravitational field as a consequence of the correspondence inferred between the ensemble dynamics of stochastic systems and the WKB limit of their quantum evolution. We demonstrate that the time dependence of the ensemble distribution is associated with the first-order correction in to the WKB expansion of the energy spectrum. © 2008 IOP Publishing Ltd.
Original languageEnglish
Article number065007
Pages (from-to)-
JournalClassical and Quantum Gravity
Volume25
Issue number6
DOIs
Publication statusPublished - 21 Mar 2008
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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