Bounce and cyclic cosmology in extended nonlinear massive gravity

TL;DR

This paper explores how extended nonlinear massive gravity can produce non-singular bounce and cyclic cosmological models by manipulating scalar fields and Stuckelberg functions, affecting universe evolution.

Contribution

It introduces a novel approach to cyclic cosmology using extended nonlinear massive gravity with scalar fields and Stuckelberg functions.

Findings

Achieves non-singular bounce solutions.

Demonstrates cyclic universe scenarios.

Shows significant impact on early and late universe evolution.

Abstract

We investigate non-singular bounce and cyclic cosmological evolutions in a universe governed by the extended nonlinear massive gravity, in which the graviton mass is promoted to a scalar-field potential. The extra freedom of the theory can lead to certain energy conditions violations and drive cyclicity with two different mechanisms: either with a suitably chosen scalar-field potential under a given Stuckelberg-scalar function, or with a suitably chosen Stuckelberg-scalar function under a given scalar-field potential. Our analysis shows that extended nonlinear massive gravity can alter significantly the evolution of the universe at both early and late times.