Bouncing Universes with Varying Constants
天体物理学
2009-11-10 v1 广义相对论与量子宇宙学
高能物理 - 唯象学
高能物理 - 理论
摘要
We investigate the behaviour of exact closed bouncing Friedmann universes in theories with varying constants. We show that the simplest BSBM varying-alpha theory leads to a bouncing universe. The value of alpha increases monotonically, remaining approximately constant during most of each cycle, but increasing significantly around each bounce. When dissipation is introduced we show that in each new cycle the universe expands for longer and to a larger size. We find a similar effect for closed bouncing universes in Brans-Dicke theory, where also varies monotonically in time from cycle to cycle. Similar behaviour occurs also in varying speed of light theories.
引用
@article{arxiv.astro-ph/0406369,
title = {Bouncing Universes with Varying Constants},
author = {John D. Barrow and Dagny Kimberly and Joao Magueijo},
journal= {arXiv preprint arXiv:astro-ph/0406369},
year = {2009}
}