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 $Łambda$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.
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