Non-zero torsion and late cosmology

Miguel Cruz, Fernando Izaurieta, Samuel Lepe

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

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 Λ 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.

Original languageEnglish
Article number559
JournalEuropean Physical Journal C
Volume80
Issue number6
DOIs
StatePublished - 1 Jun 2020
Externally publishedYes

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