Cosmological inflation driven by a scalar torsion function

Abstract

A viable model for inflation driven by a torsion function in a Friedmann background is presented. The scalar spectral index in the interval $0.92\lesssim n_s\lesssim 0.97$ is obtained in order to satisfy the initial conditions for inflation. The post inflationary phase is also studied, and the analytical solutions obtained for scale factor and energy density generalizes that ones for a matter dominated universe, indicating just a small deviation from the standard model evolution. The same kind of torsion function used also describes satisfactorily the recent acceleration of the universe, which could indicate a possible unification of different phases, apart form specific constants.

8 pages, 2 figures, submitted to EPJC

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• The dark side of the torsion: Dark Energy from propagating torsion
• The Cosmology of Quadratic Torsionful Gravity
• Metric-Affine Vector-Tensor Correspondence and Implications in $F(R,T,Q,\mathcal{T},\mathcal{D})$ gravity
• Dark matter from torsion in Friedmann cosmology
• Dissipative quintessence, and its cosmological implications
• Friedmann-like universes with non-metricity
• Multiscalar-torsion Cosmology: Exact and Analytic Solutions from Noether Symmetries
• The Role of Torsion in Trans-Planckian Physics
• Holographic Dark Energy with Torsion
• Kinematic reconstruction of torsion as dark energy in Friedmann cosmology
• Twisting inflation to sub-Planckian axion decay constants