Ambient cosmology and spacetime singularities

The European Physical Journal C

Ignatios Antoniadis¹  Spiros Cotsakis² 

[1] Albert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, Bern University, Sidlerstrasse 5, 3012, Bern, Switzerland;Ecole Polytechnique, 91128, Palaiseau, France;Department of Physics, CERN, Theory Division, 1211, Geneva 23, Switzerland;School of Applied Mathematics and Physical Sciences, National Technical University, 15780, Athens, Greece;

关键词: Formal Power Series;    Conformal Structure;    Conformal Factor;    Warp Factor;    Conformal Class;   

DOI  :  10.1140/epjc/s10052-015-3269-0

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY