The Quantum Gravitational Back-Reaction On Inflation

Details The Quantum Gravitational Back-Reaction On Inflation The Quantum Gravitational Back-Reaction On Inflation

1996-02-15

arxiv.org/abs/hep-ph/9602316v3

Annals Phys.253:1-54,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

65 pages, plain TeX, 5 Postscript files, uses psfig.sty, revised June 1996 for publication in Annals of Physics, note that the

Scientific paper

10.1006/aphy.1997.5613

We describe our recent calculation of two-loop corrections to the expansion rate of an initially inflating universe on the manifold $T^3 \times \Re$. If correct, our result proves that quantum gravitational effects slow the rate of inflation by an amount which becomes non-perturbatively large at late times. In a preliminary discussion of basic issues we show that the expansion rate is a gauge invariant, and that our ultraviolet regulator does not introduce spurious time dependence. We also derive a sharp bound on the maximum strength of higher loop effects.

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