Nonlocal Cosmology
Astrophysics
2011-05-31 v2 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
We explore nonlocally modified models of gravity, inspired by quantum loop corrections, as a mechanism for explaining current cosmic acceleration. These theories enjoy two major advantages: they allow a delayed response to cosmic events, here the transition from radiation to matter dominance, and they avoid the usual level of fine tuning; instead, emulating Dirac's dictum, the required large numbers come from the large time scales involved. Their solar system effects are safely negligible, and they may even prove useful to the black hole information problem.
Cite
@article{arxiv.0706.2151,
title = {Nonlocal Cosmology},
author = {S. Deser and R. P. Woodard},
journal= {arXiv preprint arXiv:0706.2151},
year = {2011}
}