Stochastic Gravity and Self-Organized Critical Cosmology

Details Stochastic Gravity and Self-Organized Critical Cosmology Stochastic Gravity and Self-Organized Critical Cosmology

1997-03-12

arxiv.org/abs/gr-qc/9703032v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages RevTex. Talk given at the XXXIInd Rencontres de Moriond, Les Arcs, France, January, 1997

Scientific paper

A stochastic theory of gravity is described in which the metric tensor is a random variable such that the spacetime manifold is a fluctuating physical system at a certain length scale. A general formalism is described for calculating probability densities for gravitational phenomena in a generalization of general relativity (GR), which reduces to classical GR when the magnitude of the metric fluctuations is negligible. Singularities in gravitational collapse and in big-bang cosmology have zero probability of occurring. A model of a self-organized critical universe is described which is independent of its initial conditions.

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