Early dark energy and its interaction with dark matter

TL;DR

This paper investigates early dark energy models with interactions with dark matter, analyzing their effects on cosmic structure formation and the CMB, and constrains model parameters using observational data.

Contribution

It introduces a class of early dark energy models with dark sector interactions and assesses their observational viability.

Findings

Early dark energy influences structure growth and CMB spectra.

Interaction between dark energy and dark matter affects cosmological observations.

Model parameters are constrained by current observational data.

Abstract

We study a class of early dark energy models which has substantial amount of dark energy in the early epoch of the universe. We examine the impact of the early dark energy fluctuations on the growth of structure and the CMB power spectrum in the linear approximation. Furthermore we investigate the influence of the interaction between the early dark energy and the dark matter and its effect on the structure growth and CMB. We finally constrain the early dark energy model parameters and the coupling between dark sectors by confronting to different observations.