Inflationary cosmology with a non-analytic Lagrangian

TL;DR

This paper explores a non-analytic higher order gravity theory that naturally produces power-law inflation, suggesting inflation may be a common feature of such theories beyond standard models.

Contribution

It introduces a novel non-analytic Lagrangian in higher order gravity, demonstrating its capacity to generate inflationary behavior.

Findings

The theory exhibits power-law inflation.

Inflation appears as a generic feature of higher derivative gravity.

Supports the idea that inflation is common in extended gravity models.

Abstract

We consider an alternative higher order gravity theory which is non-analytic in the Ricci curvature. It has power-law inflationary behaviour. This is further evidence that inflation is a general property of higher derivative gravity theories.