Inflation Deflation and Frame-Independence in String Cosmology
High Energy Physics - Theory
2009-10-22 v1 Astrophysics
General Relativity and Quantum Cosmology
Abstract
The inflationary scenarios suggested by the duality properties of string cosmology in the Brans-Dicke (or String) frame are shown to correspond to accelerated contraction (deflation) when Weyl-transformed to the Einstein frame. We point out that the basic virtues of inflation (solving the flatness and horizon problems, amplifying vacuum fluctuations, etc.) have physically equivalent counterparts in the deflationary (Einstein-frame) picture. This could be the answer to some objections recently raised to superstring cosmology.
Cite
@article{arxiv.hep-th/9309023,
title = {Inflation Deflation and Frame-Independence in String Cosmology},
author = {M Gasperini and G Veneziano},
journal= {arXiv preprint arXiv:hep-th/9309023},
year = {2009}
}
Comments
14 pages, CERN-TH.6955/93