Lorentz non-invariance, locality, unitarity and renormalizability in quantum gravity

Barvinsky, A. O. (2022) Lorentz non-invariance, locality, unitarity and renormalizability in quantum gravity. Il nuovo cimento C, 45 (2). pp. 1-11. ISSN 1826-9885

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Abstract

We discuss problems of covariant renormalization of Lorentz noninvariant, local and unitary Hoˇrava gravity models in arbitrary spacetime dimensions, including perturbatively renormalizable projectable Hoˇrava gravity in (2 + 1) and (3 + 1) dimensions. Renormalization group flow with asymptotically free UV fixed point is presented in (2 + 1)-dimensional theory. A related model of generalized unimodular gravity (GUMG) is shown to have interesting applications in cosmological inflation theory and within the cosmological dark energy problem. The unification of these two models sharing in common Lorentz symmetry violation, fixation of the lapse function and a number of other features is conjectured in the framework of generalized renormalization group approach.

Item Type:	Article
Subjects:	500 Scienze naturali e Matematica > 530 Fisica
Depositing User:	Marina Spanti
Date Deposited:	05 May 2022 09:26
Last Modified:	05 May 2022 09:26
URI:	http://eprints.bice.rm.cnr.it/id/eprint/21843

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