Type I singularities and the Phantom Menace
General Relativity and Quantum Cosmology
2008-11-26 v4 High Energy Physics - Phenomenology
Abstract
We consider the future dynamics of a transient phantom dominated phase of the universe in LQC and in the RS braneworld, which both have a non-standard Friedmann equation. We find that for a certain class of potentials, the Hubble parameter oscillates with simple harmonic motion in the LQC case and therefore avoids any future singularity. For more general potentials we find that damping effects eventually lead to the Hubble parameter becoming constant. On the other hand in the braneworld case we find that although the type I singularity can be avoided, the scale factor still diverges at late times.
Keywords
Cite
@article{arxiv.0704.3606,
title = {Type I singularities and the Phantom Menace},
author = {Tapan Naskar and John Ward},
journal= {arXiv preprint arXiv:0704.3606},
year = {2008}
}