Horizon Problem Remediation via Deformed Phase Space

Details Horizon Problem Remediation via Deformed Phase Space Horizon Problem Remediation via Deformed Phase Space

2010-06-30

arxiv.org/abs/1006.5893v2

Gen.Rel.Grav.43:2895-2910,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

13 pages, 2 figures, to appear in GERG

Scientific paper

10.1007/s10714-011-1208-4

We investigate the effects of a special kind of dynamical deformation between the momenta of the scalar field of the Brans-Dicke theory and the scale factor of the FRW metric. This special choice of deformation includes linearly a deformation parameter. We trace the deformation footprints in the cosmological equations of motion when the BD coupling parameter goes to infinity. One class of the solutions gives a constant scale factor in the late time that confirms the previous result obtained via another approach in the literature. This effect can be interpreted as a quantum gravity footprint in the coarse grained explanation. The another class of the solutions removes the big bang singularity, and the accelerating expansion region has an infinite temporal range which overcomes the horizon problem. After this epoch, there is a graceful exiting by which the universe enters in the radiation dominated era.

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