Holographic dark energy described at the Hubble length

Authors:
Publisher website
Google Scholar
Abstract
We consider holographic cosmological models of dark energy in which the infrared cutoff is set by the Hubble's radius. We show that any interacting dark energy model with a matterlike term able to alleviate the coincidence problem (i.e., with a positive interaction term, regardless of its detailed form) can be recast as a noninteracting model in which the holographic parameter c2 evolves slowly with time. Two specific cases are analyzed. First, the interacting model presented by Duran, Pav\'on, and Zimdahl [J. Cosmol. Astropart. Phys. 07 (2010) 018.] is considered, and its corresponding noninteracting version found. Then, a new noninteracting model, with a specific c2(z) expression, is proposed and analyzed along with its corresponding interacting version. We constrain the parameters of both models using observational data and show that they can be distinguished at the perturbative level.
All Related Versions

This publication has 52 references indexed in Scilit: