Journal article
Inflationary perturbations with Lifshitz scaling
Abstract
Instead of Lorentz invariance, gravitational degrees of freedom may obey Lifshitz scaling at high energies, as it happens in Hořava's proposal for quantum gravity. We study consequences of this proposal for the spectra of primordial perturbations generated at inflation. Breaking of 4D diffeomorphism (Diff) invariance down to the foliation-preserving Diff in Hořava-Lifshitz (HL) gravity leads to appearance of a scalar degree of freedom in the …
Authors
Arai S; Sibiryakov S; Urakawa Y
Journal
Journal of Cosmology and Astroparticle Physics, Vol. 2019, No. 03, pp. 034–034
Publisher
IOP Publishing
Publication Date
March 1, 2019
DOI
10.1088/1475-7516/2019/03/034
ISSN
1475-7516