# Anisotropic multiple bounce models

## TL;DR

This paper explores a Galileon ghost condensate bouncing cosmological model with anisotropic stress, revealing complex dynamics including multiple bounces and singularity avoidance depending on initial conditions.

## Contribution

It uncovers the rich structure of anisotropic bouncing models and demonstrates diverse cosmological behaviors within a single theoretical framework.

## Key findings

- Multiple qualitatively different regimes identified through numerical analysis
- Bouncing behavior varies with initial conditions and can include multiple bounces
- Anisotropies influence the evolution, affecting singularity avoidance and bounce dynamics

## Abstract

We analyze the Galileon ghost condensate implementation of a bouncing cosmological model in the presence of a non negligible anisotropic stress. We exhibit its structure, which we find to be far richer than previously thought. In particular, even restricting attention to a single set of underlying microscopic parameters, we obtain, numerically, many qualitatively different regimes: depending on the initial conditions on the scalar field leading the dynamics of the universe, the contraction phase can evolve directly towards a singularity, avoid it by bouncing once, or even bounce many times before settling into an ever-expanding phase. We clarify the behavior of the anisotropies in these various situations.