Dynamics of Quintom and Hessence Energies in Loop Quantum Cosmology

TL;DR

This paper explores the dynamics of quintom and hessence dark energy models within Loop Quantum Cosmology, revealing stable attractors with decelerated expansion and no future singularities, differing from classical gravity predictions.

Contribution

It is the first to analyze the stability and expansion behavior of quintom and hessence energies specifically in Loop Quantum Cosmology.

Findings

Stable attractors with decelerated expansion identified.

All stable attractors have EoS > -1, avoiding future singularities.

Results differ from classical Einstein gravity and phantom models.

Abstract

In the present work, we investigate the universe dominated by quintom or hessence energies in Loop Quantum Cosmology (LQC). Interestingly enough, we find that there are some stable attractors in these two cases. In the case of quintom, all stable attractors have the feature of decelerated expansion. In the case of hessence, most of stable attractors have the feature of decelerated expansion while one stable attractor can have decelerated or accelerated expansion depend on the model parameter. In all cases, the equation-of-state parameter (EoS) of all stable attractors are larger than -1 and there is no singularity in the finite future. These results are different from the dynamics of phantom in LQC, or the ones of phantom, quintom and hessence in classical Einstein gravity.