Nonlocal theories of gravity: the flat space propagator
General Relativity and Quantum Cosmology
2013-07-23 v2
Abstract
It was recently found that there are classes of nonlocal gravity theories that are free of ghosts and singularities in their Newtonian limit [PRL, 108 (2012), 031101]. In these proceedings, a detailed and pedagogical derivation of a main result, the flat space propagator for an arbitrary covariant metric theory of gravitation, is presented. The result is applied to analyse f(R) models, Gauss-Bonnet theory, Weyl-squared gravity and the potentially asymptotically free nonlocal theories.
Keywords
Cite
@article{arxiv.1302.0532,
title = {Nonlocal theories of gravity: the flat space propagator},
author = {Tirthabir Biswas and Tomi Koivisto and Anupam Mazumdar},
journal= {arXiv preprint arXiv:1302.0532},
year = {2013}
}
Comments
12 pages. Prepared for "Proceedings of the Barcelona Postgrad Encounters on Fundamental Physics". V2: typos fixed, added a reference