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- W3103260012 abstract "We study a correspondence between f(R) model of gravity in the Jordan frame and a phenomenological kind of dark energy (DE), which is known as QCD ghost DE. Since this kind of DE is not stable in the context of Einsteinian theory of gravity and Brans–Dicke model of gravity, we consider two kinds of correspondence between modified gravity and DE. By studding the dynamical evolution of model and finding relevant quantities such as, equation of state parameter, deceleration parameter, dimensionless density parameter, we show that the model can describe the present Universe and also the EoS parameter can cross the phantom divide line without needs to any kinetic energy with negative sign. Furthermore, by obtaining the adiabatic squared sound speed of the model for different cases of interaction, we show that this model is stable. Finally, we fit this model with supernova observational data in a noninteraction case and we find the best values of parameter at 1σ confidence interval as; [Formula: see text], [Formula: see text] and [Formula: see text]. These best-fit values show that DE equation of state parameter, ω d 0 , can cross the phantom divide line at the present time." @default.
- W3103260012 created "2020-11-23" @default.
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- W3103260012 date "2012-06-01" @default.
- W3103260012 modified "2023-10-16" @default.
- W3103260012 title "GHOST DARK ENERGY IN f(R) MODEL OF GRAVITY" @default.
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- W3103260012 doi "https://doi.org/10.1142/s0218271812500575" @default.
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