Perturbation in an interacting dark universe

TL;DR

This paper investigates how interactions between dark energy and dark matter influence cosmic structure formation, revealing that stronger interactions leave early imprints on dark energy fluctuations.

Contribution

It introduces a numerical analysis of perturbations in an interacting dark energy model, highlighting early epoch effects of increased interaction strength.

Findings

Higher interaction rates cause noticeable early fluctuations in dark energy density.

Dark matter growth is affected by the interaction, altering structure formation.

Early universe imprints depend on the coupling strength.

Abstract

In this paper we have considered an interacting model of dark energy and have looked into the evolution of the dark sectors. By solving the perturbation equations numerically, we have studied the imprints on the growth of matter as well as dark energy fluctuations. It has been found that for higher rate of interaction strength for the coupling term, visible imprints on the dark energy density fluctuations are observed at the early epochs of evolution.