Eur. Phys. J. C (2020) 80: 559
https://doi.org/10.1140/epjc/s10052-020-8128-y

Regular Article - Theoretical Physics

Non-zero torsion and late cosmology

¹ Facultad de Física, Universidad Veracruzana, 91000, Xalapa, Veracruz, México
² Departamento de Física, Universidad de Concepción, Casilla 160, 4070105, Concepción, Chile
³ Instituto de Física, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2950, Valparaíso, Chile

^* e-mail: miguelcruz02@uv.mx

Received: 9 May 2020
Accepted: 7 June 2020
Published online: 19 June 2020

Abstract

In this work, we study some thermodynamical aspects associated with torsion in a flat FLRW spacetime cosmic evolution. By implementing two Ansatze for the torsion term, we find that the model admits a phantom regime or a quintessence behavior. This scheme differs from the CDM model at the thermodynamical level. The resulting cosmic expansion is not adiabatic, the fulfillment of the second law of thermodynamics requires a positive torsion term, and the temperature of the cosmic fluid is always positive. The entropy of the torsion phantom scenario is negative, but introducing chemical potential solves this issue. For a Dirac-Milne type Universe, the torsion leads to a growing behavior for the temperature of the fluid but has no incidence on the rate of expansion.