Nonsingular rainbow universes

Journal Article · Tue Oct 01 00:00:00 EDT 2013 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2013/10/052· OSTI ID:22282600

Awad, Adel; Ali, Ahmed Farag ^[1]; Majumder, Barun ^[2]

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1. Center for Theoretical Physics, Zewail City of Science and Technology, Giza, 12588 (Egypt)
2. Indian Institute of Technology Gandhinagar, Ahmedabad, Gujarat 382424 (India)

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.

• OSTI ID: 22282600
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2013, Issue 10; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COSMOLOGICAL MODELS
COSMOLOGY
DISPERSION RELATIONS
GRAVITATION
MATHEMATICAL SOLUTIONS
UNIVERSE