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Title: Nonsingular rainbow universes

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.
Authors:
;  [1] ;  [2]
  1. Center for Theoretical Physics, Zewail City of Science and Technology, Giza, 12588 (Egypt)
  2. Indian Institute of Technology Gandhinagar, Ahmedabad, Gujarat 382424 (India)
Publication Date:
OSTI Identifier:
22282600
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2013; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGICAL MODELS; COSMOLOGY; DISPERSION RELATIONS; GRAVITATION; MATHEMATICAL SOLUTIONS; UNIVERSE