A Newtonian Model for the Quantum Gravitational Back-Reaction on Inflation

Details A Newtonian Model for the Quantum Gravitational Back-Reaction on Inflation A Newtonian Model for the Quantum Gravitational Back-Reaction on Inflation

2001-07-11

arxiv.org/abs/gr-qc/0107042v1

Nucl.Phys.Proc.Suppl. 104 (2002) 173-176

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, LaTeX 2.6, no figures. Talk given at the International Meeting on Quantum Gravity and Spectral Geometry, Naples, Ital

Scientific paper

10.1016/S0920-5632(01)01607-3

Quantum gravitational back-reaction offers a simultaneous explanation for why the cosmological constant is so small and a natural model of inflation in which scalars play no role. In this talk I review previous work and present a simple model of the mechanism in which the induced stress tensor behaves like negative vacuum energy with a density proportional to $-\Lambda/{8\pi G} \cdot (G \Lambda)^2 \cdot H t$. The model also highlights the essential role of causality in back-reaction.

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