Inverse volume corrections from loop quantum gravity and the primordial tensor power spectrum in slow-roll inflation
General Relativity and Quantum Cosmology
2013-05-29 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
Together with holonomy corrections, inverse volume terms should be taken into account when studying the primordial universe in loop quantum cosmology. We investigate how the tensor power spectrum is modified with respect to the standard general relativistic prediction by those semiclassical corrections. Depending on the values of the free parameters of the model, it is shown that the spectrum can exhibit a very large deviation from its usual shape, in particular with a very red slope and a strong running in the infrared limit.
Keywords
Cite
@article{arxiv.0902.3605,
title = {Inverse volume corrections from loop quantum gravity and the primordial tensor power spectrum in slow-roll inflation},
author = {J. Grain and A. Barrau and A. Gorecki},
journal= {arXiv preprint arXiv:0902.3605},
year = {2013}
}
Comments
15 pages, 5 figures, published version with minor modifications, results unchanged