Crossing the phantom divide without phantom matter
天体物理学
2009-11-11 v1 广义相对论与量子宇宙学
高能物理 - 理论
摘要
A class of braneworld models can lead to phantom-like acceleration of the late universe, but without the need for any phantom matter. In the simplest models, the universe contains only cold dark matter and a cosmological constant. We generalize these models by introducing a quintessence field. The new feature in our models is that quintessence leads to a crossing of the phantom divide, . This is a purely gravitational effect, and there is no phantom instability. Furthermore, the Hubble parameter is always decreasing, and there is no big rip singularity in the future.
引用
@article{arxiv.astro-ph/0605450,
title = {Crossing the phantom divide without phantom matter},
author = {Luis P. Chimento and Ruth Lazkoz and Roy Maartens and Israel Quiros},
journal= {arXiv preprint arXiv:astro-ph/0605450},
year = {2009}
}
备注
5 pages, 5 figures, revtex4