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Rainbow universe

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arxiv gr-qc/0609129 v1 pith:H2MUBI2M submitted 2006-09-28 gr-qc

Rainbow universe

Yi Ling This is my paper
classification gr-qc
keywords cosmologicalequationsgravitymodifiedquantumradiationrainbowuniverse
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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.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Gravitational Baryogenesis in Rainbow Gauss-Bonnet gravity

    gr-qc 2026-07 reject novelty 4.0

    Gravitational baryogenesis in a rainbow-gravity-corrected 4D Gauss-Bonnet model can in principle produce Y_B ~ 10^-10 during radiation domination, but only by fitting seven free parameters and using the effective theo...