Dynamical analysis of quantum matter bounces with dark sector mimickers

TL;DR

This paper analyzes a quantum matter bounce cosmological model involving scalar fields and fluids, demonstrating a transition from a contracting universe to an expanding one with phases resembling dark energy, radiation, and dark matter.

Contribution

It introduces a novel bounce scenario with scalar fields and fluids that models multiple cosmic phases, including dark energy, radiation, and dark matter, with quantum bounce transitions.

Findings

The model exhibits tracking behavior between scalar field and fluids.

It supports a smooth transition from contraction to expansion through quantum bounce.

The scenario includes an inflationary phase and a scalar field dark matter candidate.

Abstract

We study the effects of the inclusion of fluids In bounce scenarios driven by an exponential potential scalar field. Most solutions exhibit well known tracking behavior between the fluids and the scalar field. This tracking behavior can model transitions between different phases of cosmic evolution. We will focus on an interesting bouncing model with a dust matter fluid, where the scalar field can drive an early dark energy expanding period with a radiation-like dominated phase just after it, and then tracks the dust matter fluid with energy density compatible with the dark matter energy density. The model is dust dominated in the far past of the contracting phase, and has stiff matter behavior when approaching the singularity, allowing well known quantum bounce transitions to the expanding era. Hence, it is a quantum matter bounce scenario with an inflationary phase together with a smooth transition through a radiation era to matter domination with a possible scalar field dark matter candidate.