Step potentials for Dark Energy

TL;DR

This paper reconstructs the scalar field potential for dark energy using observational data, revealing a step feature where kinetic and potential energies are comparable, suggesting a specific structure in dark energy models.

Contribution

It introduces a reconstruction scheme based on observational data to identify features in the dark energy scalar field potential, highlighting a step-like structure.

Findings

The potential exhibits a step feature consistent with observational data.

Kinetic and potential energies are of similar magnitude at the step.

Reconstruction constrains the form of dark energy scalar field potential.

Abstract

We consider a reconstructing scheme using observational data from SNIa, BAO and CMB, based on a model of dark unification using a single non-minimally coupled scalar field. We investigate through a reconstruction program, the main features the current observational data imposes to the scalar field potential. We found that the form suggested by observations implies a step feature in the potential, where the kinetic and potential energy becomes of the same order of magnitude.