Eur. Phys. J. C (2020) 80: 666
https://doi.org/10.1140/epjc/s10052-020-8233-y

Regular Article - Theoretical Physics

Twinlike models for parametrized dark energy

¹ Unidade Acadêmica de Física e Matemática, Universidade Federal de Campina Grande, Cuité, PB, 58175-000, Brazil
² Departamento de Física, Universidade Estadual da Paraíba, Araruna, PB, 58233-000, Brazil

^* e-mail: jjrodrigues@uepb.edu.br

Received: 31 March 2020
Accepted: 12 July 2020
Published online: 24 July 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.