Dark energy, wormholes, and the Big Rip
General Relativity and Quantum Cosmology
2009-11-11 v1 Astrophysics
Abstract
The time evolution of a wormhole in a Friedmann universe approaching the Big Rip is studied. The wormhole is modeled by a thin spherical shell accreting the superquintessence fluid - two different models are presented. Contrary to recent claims that the wormhole overtakes the expansion of the universe and engulfs it before the Big Rip is reached, it is found that the wormhole becomes asymptotically comoving with the cosmic fluid and the future evolution of the universe is fully causal.
Cite
@article{arxiv.gr-qc/0503005,
title = {Dark energy, wormholes, and the Big Rip},
author = {Valerio Faraoni and Werner Israel},
journal= {arXiv preprint arXiv:gr-qc/0503005},
year = {2009}
}
Comments
15 pages, LaTeX, to appear in Phys. Rev. D