Does curvature-dilaton coupling with Kalb Ramond field lead to an accelerating Universe ?

TL;DR

This paper explores how curvature-dilaton coupling with a Kalb-Ramond field in a torsion spacetime can eliminate the big bang singularity and produce an accelerating universe, considering matter and radiation eras.

Contribution

It demonstrates that a spacetime with torsion from a Kalb-Ramond field and dilaton can avoid singularities and induce cosmic acceleration, offering a novel approach to early universe modeling.

Findings

Universe free from big bang singularity

Acceleration during universe evolution

Dilaton role in decelerating early universe

Abstract

In this work we show that the Universe evolving in a spacetime with torsion (originated from a second rank antisymmetric Kalb-Ramond field) and dilaton is free from any big bang singularity and can have acceleration during the evolution. Both the matter and radiation dominated era have been considered and the role of the dilaton to explain the decelerating phase in the earlier epoch has also been discussed.