Shortcuts in the fifth dimension
General Relativity and Quantum Cosmology
2009-11-07 v1 Astrophysics
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
If our Universe is a three-brane embedded in a five-dimensional anti-deSitter spacetime, in which matter is confined to the brane and gravity inhabits an infinite bulk space, then the causal propagation of luminous and gravitational signals is in general different. A gravitational signal traveling between two points on the brane can take a ``shortcut'' through the bulk, and appear quicker than a photon traveling between the same two points along a geodesic on the brane. Similarly, in a given time interval, a gravitational signal can propagate farther than a luminous signal. We quantify this effect, and analyze the impact of these shortcuts through the fifth dimension on cosmology.
Cite
@article{arxiv.gr-qc/0103070,
title = {Shortcuts in the fifth dimension},
author = {Robert R. Caldwell and David Langlois},
journal= {arXiv preprint arXiv:gr-qc/0103070},
year = {2009}
}
Comments
11 pages, 2 figures