Cosmological footprints of loop quantum gravity
General Relativity and Quantum Cosmology
2009-04-09 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
High Energy Physics - Theory
Quantum Physics
Abstract
The primordial spectrum of cosmological tensor perturbations is considered as a possible probe of quantum gravity effects. Together with string theory, loop quantum gravity is one of the most promising frameworks to study quantum effects in the early universe. We show that the associated holonomy correction should modify the potential seen by gravitational waves during the inflationary amplification. The resulting power spectrum should exhibit a characteristic tilt. This opens a new window for cosmological tests of quantum gravity.
Cite
@article{arxiv.0902.0145,
title = {Cosmological footprints of loop quantum gravity},
author = {J. Grain and A. Barrau},
journal= {arXiv preprint arXiv:0902.0145},
year = {2009}
}
Comments
Accepted by Phys. Rev. Lett., 7 pages, 2 figures