Modified f(R) gravity unifying R^m inflation with \LambdaCDM epoch

TL;DR

This paper proposes a modified $f(R)$ gravity model that unifies early inflation with late-time acceleration, passes local tests, and offers a realistic alternative to General Relativity.

Contribution

It introduces a specific $f(R)$ model unifying inflation and dark energy, demonstrating its consistency with local tests and exploring future evolution scenarios.

Findings

Model passes Newton law and stability tests

Features a heavy scalar degree of freedom

Provides a viable alternative to General Relativity

Abstract

We consider modified $f(R)$ gravity which may unify $R^m$ early-time inflation with late-time $\Lambda$CDM epoch. It is shown that such model passes the local tests (Newton law, stability of Earth-like gravitational solution, very heavy mass for additional scalar degree of freedom) and suggests the realistic alternative for General Relativity. Various scenarios for future evolution of $f(R)$ $\Lambda$CDM era are discussed.