Crossing the phantom divide with Ricci-like holographic dark energy

TL;DR

This paper explores a holographic dark energy model based on Ricci scalar curvature, demonstrating a crossing of the equation of state parameter through -1 and comparing it with scalar field theory approaches.

Contribution

It introduces a Ricci-like holographic dark energy model with a specific cosmological scenario and analyzes its observational consistency and theoretical differences.

Findings

Dark energy equation of state crosses -1 barrier

Model parameters fit observational data

Disagreement with scalar field theory approach

Abstract

We study a holographic model for the dark energy considered recently in the literature which postulates an energy density $\rho \sim R$, where $R$ is the Ricci scalar curvature. We obtain a cosmological scenario that comes from considering two non-interacting fluids along a reasonable Ansatz for the cosmic coincidence parameter. We adjust the involved parameters in the model according to the observational data and we show that the equation of state for the dark energy experience a cross through the -1 barrier. In addition, we find a disagreement in these parameters with respect to an approach from a scalar field theory.