Varying G and Other Constants
Abstract
We review recent progress in the study of varying constants and attempts to explain the observed values of the fundamental physical constants. We describe the variation of in Newtonian and relativistic scalar-tensor gravity theories. We highlight the behaviour of the isotropic Friedmann solutions and consider some striking features of primordial black hole formation and evaporation if varies. We discuss attempts to explain the values of the constants and show how we can incorporate the simultaneou s variations of several 'constants' exactly by using higher-dimensional unified theories. Finally, we describe some new observational limits on possible space or time variations of the fine structure constant.
Cite
@article{arxiv.gr-qc/9711084,
title = {Varying G and Other Constants},
author = {John D. Barrow},
journal= {arXiv preprint arXiv:gr-qc/9711084},
year = {2009}
}
Comments
37 pages, Tex file, no figures. Lecture notes. Erice Summer School 'Current Topics in Astrofundamental Physics' 4-15 September 1997