Nonsingular Rainbow Universes
General Relativity and Quantum Cosmology
2013-11-15 v3 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
In this work, we study FRW cosmologies in the context of gravity rainbow. We discuss the general conditions for having a nonsingular FRW cosmology in gravity rainbow. We propose that gravity rainbow functions can be fixed using two known modified dispersion relation (MDR), which have been proposed in literature. The first MDR was introduced by Amelino-Camelia, et el. in [9] and the second was introduced by Magueijo and Smolin in [24]. Studying these FRW-like cosmologies, after fixing the gravity rainbow functions, leads to nonsingular solutions which can be expressed in exact forms.
Cite
@article{arxiv.1308.4343,
title = {Nonsingular Rainbow Universes},
author = {Adel Awad and Ahmed Farag Ali and Barun Majumder},
journal= {arXiv preprint arXiv:1308.4343},
year = {2013}
}
Comments
Highlighted in Nature Middle East (http://www.nature.com/nmiddleeast/2013/130815/full/nmiddleeast.2013.211.html)