Relic gravitons from non-singular string cosmologies
arXiv:hep-th/0010085 · doi:10.1063/1.1363572
Abstract
In the context of the pre-Big Bang scenario of string cosmology, we propose a modified equation for the evolution of the tensor perturbations, which includes the full contribution of possible higher-order curvature and coupling corrections required to regularise the background evolution. We then discuss the high-frequency branch of the spectrum of primordial gravitons.
Contribution to CAPP2000, Verbier (Switzerland),July 2000. To appear in the Proceedings (American Institute of Physics publication)