Quantum Gravity Slows Inflation

Details Quantum Gravity Slows Inflation Quantum Gravity Slows Inflation

1996-02-15

arxiv.org/abs/hep-ph/9602315v3

Nucl.Phys.B474:235-248,1996

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, plain TeX, 1 Postscript file, uses psfig.sty, revised June 1996 for publication in Nuclear Physics B

Scientific paper

10.1016/0550-3213(96)00246-5

We consider the quantum gravitational back-reaction on an initially inflating, homogeneous and isotropic universe whose topology is $T^3 \times \Re$. Although there is no secular effect at one loop, an explicit calculation shows that two-loop processes act to slow the rate of expansion by an amount which becomes non-perturbatively large at late times. By exploiting Feynman's tree theorem we show that all higher loops act in the same sense.

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