Local gravity test of unified models of inflation and dark energy in $f(R)$ gravity

Abstract

We consider $f(R)$ gravity theories which unify $R^n$ inflation and dark energy models. First, from the final Planck data of the cosmic microwave background, we obtain a condition, $1.977<n<2.003$. Next, under this constraint, we investigate local-gravity tests for three models. We find that the $R^n$ term can dominate over the dark energy term even at the Earth's curvature scale, contrary to intuition; however, the $R^n$ term does not relax or tighten the constraints on the three models.

11 pages, 12 figures

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• Formalizing Anisotropic Inflation in Modified Gravity
• Towards a unified interpretation of the early Universe in $R^2$-corrected dark energy model of $F(R)$ gravity
• Pure geometric $f(R)$ branes
• On inflationary parameters in scalar-tensor theories