Status of String Cosmology: Phenomenological Aspects
Abstract
I report recent studies on the evolution of perturbations in the context of the ``pre-big-bang" scenario typical of string cosmology, with emphasis on the formation of a stochastic background of relic photons and gravitons, and its possible direct/indirect observable consequences. I also discuss the possible generation of a thermal microwave background by using, as example, a simple gravi-axio-dilaton model whose classical evolution connects smoothly inflationary expansion to decelerated contraction. By including the quantum back-reaction of the produced radiation the model eventually approaches the standard radiation-dominated (constant dilaton) regime.
Cite
@article{arxiv.hep-th/9509127,
title = {Status of String Cosmology: Phenomenological Aspects},
author = {M. Gasperini},
journal= {arXiv preprint arXiv:hep-th/9509127},
year = {2009}
}
Comments
37 pages, Plain TEX, 3 figures available by fax upon request, to appear in Proc. of the Erice School on "String gravity and physics at the Planck scale" (Erice, 8-19 September 1995)