Phantom cosmology in an Extended Theory of Gravity

Abstract

Some phantom cosmological models without big rip singularity have been constructed in a simple extended theory of gravity. In the geometrical part of the action, a minimally coupled linear function of the Ricci Scalar and the trace of the energy momentum tensor have been considered in place of the Ricci scalar. Four Little Rip and Pseudo Rip models have been investigated where the equation of state parameter evolves asymptotically and sufficiently rapidly to $-1$. The effect of the coupling constant of the extended gravity theory on the dynamics has been discussed. Possible wormhole solutions for the phantom models are obtained. The possibility of Big Trip in wormholes are discussed for the models.

12 pages

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Cited by in corpus (15)

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• Modelling Casimir Wormholes in Extended Gravity
• Bouncing Models in an Extended Gravity Theory
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• Role of Extended Gravity Theory in Matter Bounce Dynamics
• Cosmological models with squared trace in modified gravity
• Investigating the physical and geometrical parameters of the cosmological models with anisotropic background
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• Cuscuton-like contribution to dark energy evolution
• Dynamics of quasi de Sitter and linear combination of exponential models in extended gravity
• Cosmological models with Big rip and Pseudo rip Scenarios in extended theory of gravity