Interacting models may be key to solve the cosmic coincidence problem

TL;DR

Interacting dark energy and dark matter models could potentially resolve the cosmic coincidence problem, but require more detailed observational data to confirm their viability.

Contribution

The paper discusses the potential of energy flow models between dark energy and dark matter to address the coincidence problem.

Findings

Energy flow models may solve the coincidence problem

Current observational data are insufficient to confirm these models

Further detailed data on Hubble factor evolution are needed

Abstract

It is argued that cosmological models that feature a flow of energy from dark energy to dark matter may solve the coincidence problem of late acceleration (i.e., "why the energy densities of both components are of the same order precisely today?"). However, much refined and abundant observational data of the redshift evolution of the Hubble factor are needed to ascertain whether they can do the job.