Coupling q-deformed dark energy to dark matter

TL;DR

This paper introduces a new coupled dark energy model using a q-deformed scalar field, demonstrating its ability to produce an accelerating universe consistent with observations through phase-space analysis.

Contribution

It presents the first study of a q-deformed dark energy model coupled to dark matter and analyzes its cosmological implications.

Findings

The model exhibits late-time accelerated attractor solutions.

The q-deformed dark energy model aligns with standard dark energy in producing cosmic acceleration.

Cosmological parameters of the deformed model are comparable to standard models.

Abstract

We propose a novel coupled dark energy model which is assumed to occur as a q-deformed scalar field and investigate whether it will provide an expanding universe phase. We consider the q-deformed dark energy as coupled to dark matter inhomogeneities. We perform the phase-space analysis of the model by numerical methods and find the late-time accelerated attractor solutions. The attractor solutions imply that the coupled q-deformed dark energy model is consistent with the conventional dark energy models satisfying an acceleration phase of universe. At the end, we compare the cosmological parameters of deformed and standard dark energy models and interpret the implications.