Dynamics of interacting dark energy model in Einstein and Loop Quantum Cosmology

TL;DR

This paper explores how interacting dark energy and dark matter influence the universe's evolution, comparing Einstein and Loop Quantum Cosmology, and reveals differences in their dynamical behaviors and accelerated attractors.

Contribution

It introduces a new general form of dark sector coupling and analyzes its effects on the phase space in both Einstein and Loop Quantum Cosmology.

Findings

Differences in phase space structures between Einstein and Loop Quantum Cosmology.

Identification of conditions for accelerated scaling attractors.

Enhanced understanding of dark sector interactions in quantum cosmological models.

Abstract

We investigate the background dynamics when dark energy is coupled to dark matter in the universe described by Einstein cosmology and Loop Quantum Cosmology. We introduce a new general form of dark sector coupling, which presents us a more complicated dynamical phase space. Differences in the phase space in obtaining the accelerated scaling attractor in Einstein cosmology and Loop Quantum Cosmology are disclosed.