Semiclassical Universe from First Principles

Details Semiclassical Universe from First Principles Semiclassical Universe from First Principles

2004-11-16

arxiv.org/abs/hep-th/0411152v1

Phys.Lett. B607 (2005) 205-213

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, 4 figures

Scientific paper

10.1016/j.physletb.2004.12.067

Causal Dynamical Triangulations in four dimensions provide a background-independent definition of the sum over space-time geometries in nonperturbative quantum gravity. We show that the macroscopic four-dimensional world which emerges in the Euclidean sector of this theory is a bounce which satisfies a semiclassical equation. After integrating out all degrees of freedom except for a global scale factor, we obtain the ground state wave function of the universe as a function of this scale factor.

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