Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2006-09-28
JCAP 0708:017,2007
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
5 pages
Scientific paper
10.1088/1475-7516/2007/08/017
The formalism of rainbow gravity is studied in a cosmological setting. We consider the very early universe which is radiation dominated. A novel treatment in our paper is to look for an ``averaged'' cosmological metric probed by radiation particles themselves. Taking their cosmological evolution into account, we derive the modified Friedmann-Robertson-Walker(FRW) equations which is a generalization of the solution presented by Magueijo and Smolin. Based on this phenomenological cosmological model we argue that the spacetime curvature has an upper bound such that the cosmological singularity is absent. These modified $FRW$ equations can be treated as effective equations in the semi-classical framework of quantum gravity and its analogy with the one recently proposed in loop quantum cosmology is also discussed.
No associations
LandOfFree
Rainbow universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Rainbow universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rainbow universe will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-531615