Two Fluid FRW Inflationary Dark Energy Model Coupled With Mass Less Scalar Field

We study the evolution of the dark energy parameter in a spatially homogeneous and isotropic FRW space-time filled with barotropic fluid and dark energy coupled with zero mass scalar field. The solution of the field equations is obtained using a constant deceleration parameter. Two cases are discuss...

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Bibliographic Details
Published in:International journal of theoretical physics 2015-03, Vol.54 (3), p.1009-1020
Main Authors: Venkateswarlu, R., Satish, J.
Format: Article
Language:English
Subjects:
Elementary Particles
Mathematical and Computational Physics
Physics
Physics and Astronomy
Quantum Field Theory
Quantum Physics
Theoretical
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Summary:We study the evolution of the dark energy parameter in a spatially homogeneous and isotropic FRW space-time filled with barotropic fluid and dark energy coupled with zero mass scalar field. The solution of the field equations is obtained using a constant deceleration parameter. Two cases are discussed when the dark energy is minimally coupled to the perfect fluid as well as direct interaction with it. It is concluded that in both non-interacting and interacting cases only closed and flat universes crossed the phantom region. It is found that, during the evolution of the universe, the equation of state (EoS) for dark energy ω D changes from ω D > −1 to ω D < −1, which is consistent with recent observations. The cosmic jerk parameter of the models is also found to be in good agreement with the recent data of astrophysical observations.
ISSN:0020-7748
1572-9575
DOI:10.1007/s10773-014-2293-4