Ambient cosmology and spacetime singularities
High Energy Physics - Theory
2015-06-22 v3 General Relativity and Quantum Cosmology
Abstract
We present a new approach to the issues of spacetime singularities and cosmic censorship in general relativity. This is based on the idea that standard 4-dimensional spacetime is the conformal infinity of an ambient metric for the 5-dimensional Einstein equations with fluid sources. We then find that the existence of spacetime singularities in four dimensions is constrained by asymptotic properties of the ambient 5-metric, while the non-degeneracy of the latter crucially depends on cosmic censorship holding on the boundary.
Cite
@article{arxiv.1409.2220,
title = {Ambient cosmology and spacetime singularities},
author = {Ignatios Antoniadis and Spiros Cotsakis},
journal= {arXiv preprint arXiv:1409.2220},
year = {2015}
}
Comments
v3: 32 pages, longer version to appear in the EPJC, main idea made explicit, various mathematical and physical explanations added