Cosmic Evolution with Early and Late Acceleration Inspired by Dual Nature of the Ricci Scalar Curvature

Abstract

In the present paper, it is found that dark energy emerges spontaneously from the modified gravity. According to cosmological scenario, obtained here, the universe inflates for $\sim 10^{-37}$ sec. in the beginning and late universe accelerates after 8.58 Gyrs. During the long intermediate period, it decelerates driven by radiation and subsequently by matter. Emerged gravitational dark energy mimics quintessence and its density falls by 115 orders from its initial value $2.58\times 10^{68}{\mathrm{GeV}}^4$ to its current value $2.19\times 10^{-47}{\mathrm{GeV}}^4$ .

40 pages. To appearin Int. J. Mod. Phys. D

References in corpus (5)

• Dynamics of dark energy
• Conditions for the cosmological viability of f(R) dark energy models
• Are f(R) dark energy models cosmologically viable ?
• Avoidance of Big Rip In Phantom Cosmology by Gravitational Back Reaction
• Future Universe With w < -1 Without Big Smash

Cited by in corpus (1)

• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models