# Cosmological bounce and Genesis beyond Horndeski

## TL;DR

This paper presents a non-singular, stable bouncing cosmological model within beyond Horndeski theory, demonstrating a transition from a complex scalar field to a simple massless scalar at late times.

## Contribution

It provides a specific stable bouncing solution in beyond Horndeski theory with a smooth transition to standard scalar field behavior.

## Key findings

- The model is non-singular and stable throughout evolution.
- The scalar field transitions from beyond Horndeski behavior to minimal coupling.
- The solution demonstrates a viable alternative to Big Bang cosmology.

## Abstract

We study a "classical" bouncing scenario in beyond Horndeski theory. We give an example of spatially flat bouncing solution that is non-singular and stable throughout the whole evolution. The model is arranged in such a way that the scalar field driving the cosmological evolution initially behaves like full-fledged beyond Horndeski, whereas at late times it becomes a massless scalar field minimally coupled to gravity.