Quantum Fluctuations in Open Pre-Big Bang Cosmology
High Energy Physics - Theory
2009-10-31 v2 Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We solve exactly the (linear order) equations for tensor and scalar perturbations over the homogeneous, isotropic, open pre-big bang model recently discussed by several authors. We find that the parametric amplification of vacuum fluctuations (i.e. particle production) remains negligible throughout the perturbative pre-big bang phase.
Cite
@article{arxiv.hep-th/9806233,
title = {Quantum Fluctuations in Open Pre-Big Bang Cosmology},
author = {A. Ghosh and G. Pollifrone and G. Veneziano},
journal= {arXiv preprint arXiv:hep-th/9806233},
year = {2009}
}
Comments
12 pages, ReVTeX, Discussion of relation to Ref.[8] modified