Asymptotic safety in higher-derivative gravity

Details Asymptotic safety in higher-derivative gravity Asymptotic safety in higher-derivative gravity

2009-01-20

arxiv.org/abs/0901.2984v2

Mod.Phys.Lett.A24:2233-2241,2009

Physics

High Energy Physics

High Energy Physics - Theory

8 pages; 1 figure; revised version

Scientific paper

10.1142/S0217732309031521

We study the non-perturbative renormalization group flow of higher-derivative gravity employing functional renormalization group techniques. The non-perturbative contributions to the $\beta$-functions shift the known perturbative ultraviolet fixed point into a non-trivial fixed point with three UV-attractive and one UV-repulsive eigendirections, consistent with the asymptotic safety conjecture of gravity. The implication of this transition on the unitarity problem, typically haunting higher-derivative gravity theories, is discussed.

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