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Horava Gravity is Asymptotically Free in 2 +1 Dimensions

Research output: Contribution to journalArticlepeer-review

Andrei O. Barvinsky, Diego Blas, Mario Herrero-Valea, Sergey M. Sibiryakov, Christian F. Steinwachs

Original languageEnglish
Pages (from-to)211301
Number of pages1
JournalPhysical Review Letters
Early online date20 Nov 2017
Accepted/In press25 Oct 2017
E-pub ahead of print20 Nov 2017
Published24 Nov 2017


King's Authors


We compute the β functions of marginal couplings in projectable Hořava gravity in 2+1 spacetime dimensions. We show that the renormalization group flow has an asymptotically free fixed point in the ultraviolet (UV), establishing the theory as a UV-complete model with dynamical gravitational degrees of freedom. Therefore, this theory may serve as a toy model to study fundamental aspects of quantum gravity. Our results represent a step forward towards understanding the UV properties of realistic versions of Hořava gravity.

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