A Measure of Cosmological Acceleration

Details A Measure of Cosmological Acceleration A Measure of Cosmological Acceleration

2005-06-16

arxiv.org/abs/gr-qc/0506089v1

Class.Quant.Grav.22:4171-4177,2005

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

13 pages, LaTeX 2epsilon, no figures

Scientific paper

10.1088/0264-9381/22/19/024

We propose quantifying the quantum gravitational back-reaction on inflation with an invariant measure of the local acceleration rather than the expansion rate. Our observable is suitable for models in which there is no scalar inflaton to provide a preferred velocity field with which to define the expansion. As an example, we use stochastic techniques to evaluate the local acceleration at one loop order for Lambda-driven inflation in pure quantum gravity.

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