Exactly solvable f(R) inflation

TL;DR

This paper demonstrates that by adding a cosmological constant to the Starobinsky inflation model, the resulting equations can be solved exactly, eliminating the need for slow-roll approximations.

Contribution

It provides an exact solution to the modified Starobinsky model with a cosmological constant, advancing analytical understanding of inflationary dynamics.

Findings

Exact solutions obtained without slow-roll approximation

Extension of Starobinsky model with cosmological constant

Potential for improved inflationary predictions

Abstract

We show that adding a cosmological constant term to the Starobinsky model, it can be solved exactly without using the slow-roll approximation.