Behaviour of interacting Ricci dark energy in logarithmic f(T) gravity

preprint2012arXivOpen access

Abstract

In the present work we have considered a modified gravity dubbed as "logarithmic f(T)f(T) gravity" and investigated the behavior of Ricci dark energy interacting with pressureless dark matter. We have chosen the interaction term in the form Q∝HδρmQ\propto Hδρ_{m} and investigated the behavior of the Hubble parameter HH as a function of the redshift zz. For this reconstructed HH we have investigated the behavior of the density of the Ricci dark energy ρRDEρ_{RDE} and density contribution due to torsion ρTρ_{T}. All of the said cosmological parameters are seen to have increasing behavior from higher to lower redshifts for all values of c2c^{2} pertaining to the Ricci dark energy. Subsequently, we observed the equation of state parameter wRDEw_{RDE} in this situation. The equation of state parameter is found to behave like phantom for all choices of c2c^{2} in the Ricci dark energy.

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