Twinlike models for parametrized dark energy

Authors :: Dantas, J. D.
Rodrigues, J. J.
Publication Year :: 2020
Abstract: We study cosmological models involving a single real scalar field that has an equation of state parameter which evolves with cosmic time. We highlight some common parametrizations for the equation of state as a function of redshift in the context of twinlike theories. The procedure is used to introduce different models that have the same acceleration parameter, with the very same energy densities and pressure in flat spacetime.<br />Comment: 7 pages, 4 figures; Accepted for publication in the EPJC