Dilaton Contributions to the Cosmic Gravitational Wave Background
General Relativity and Quantum Cosmology
2009-10-22 v1 High Energy Physics - Theory
Abstract
We consider the cosmological amplification of a metric perturbation propagating in a higher-dimensional Brans-Dicke background, including a non trivial dilaton evolution. We discuss the properties of the spectral energy density of the produced gravitons (as well as of the associated squeezing parameter), and we show that the present observational bounds on the graviton spectrum provide significant information on the dynamical evolution of the early universe.
Keywords
Cite
@article{arxiv.gr-qc/9211021,
title = {Dilaton Contributions to the Cosmic Gravitational Wave Background},
author = {M. Gasperini and M. Giovannini},
journal= {arXiv preprint arXiv:gr-qc/9211021},
year = {2009}
}
Comments
26 pages, plain tex (to appear in Phys.Rev.D, 1 fig available from the authors upon req.)