Barvinsky, Andrei O.Blas, DiegoHerrero-Valea, MarioSibiryakov, Sergey M.Steinwachs, Christian F.2017-12-042017-12-042017-12-04201710.1103/PhysRevLett.119.211301https://infoscience.epfl.ch/handle/20.500.14299/142555WOS:000415687200004We compute the beta functions of marginal couplings in projectable Horava 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 Horava gravity.text::journal::journal article::research article