Inflation and dark energy from f(R) gravity

Abstract

The standard Starobinsky inflation has been extended to the $R+\alpha R^n-\beta R^{2-n}$ model to obtain a stable minimum of the Einstein frame scalar potential of the auxiliary field. As a result we have obtained obtain a scalar potential with non-zero value of residual vacuum energy, which may be a source of Dark Energy. Our results can be easily consistent with PLANCK or BICEP2 data for appropriate choices of the value of $n$.

arXiv comment14 pages, 9 figures

References in corpus (13)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Dynamics of dark energy
• f(R) theories
• Modified gravity with negative and positive powers of the curvature: unification of the inflation and of the cosmic acceleration
• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
• Curvature Quintessence
• Conditions for the cosmological viability of f(R) dark energy models
• Constraining dark energy with SNe Ia and large-scale structure
• Particle physics models of inflation and curvaton scenarios
• BICEP2 II: Experiment and Three-Year Data Set
• Nearly Starobinsky inflation from modified gravity
• Acceleration of the Universe

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• Reinterpretation of the Starobinsky model
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• New class of hybrid metric-Palatini scalar-tensor theories of gravity
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