Covariant renormalizable gravity and its FRW cosmology
High Energy Physics - Theory
2010-04-06 v3 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
We consider the diffeomorphism invariant gravity coupled with the ideal fluid in the non-standard way. The Lorentz-invariance of the graviton propagator in such a theory considered as perturbation over flat background turns out to be broken due to non-standard coupling with the ideal fluid. As a result the behavior of the propagator in the ultraviolet/infrared region indicates that some versions of such theory are (super-)renormalizable ones (with appearance of only physical transverse modes). The FRW cosmology in same cases may be different from the one in General Relativity with the possible quintessence/phantom-like inflationary stage.
Cite
@article{arxiv.0905.4213,
title = {Covariant renormalizable gravity and its FRW cosmology},
author = {Shin'ichi Nojiri and Sergei D. Odintsov},
journal= {arXiv preprint arXiv:0905.4213},
year = {2010}
}
Comments
LaTeX 5 pages, no figure, Phys. Rev. D published version, title is changed, reference is corrected