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.

arXiv comment8 pages, 2 figures, submitted to EPJC

References in corpus (20)

• Palatini Approach to Modified Gravity: f(R) Theories and Beyond
• Physical Aspects of the Space-Time Torsion
• Cosmology with torsion: An alternative to cosmic inflation
• Spacetimes with vector distortion: Inflation from generalised Weyl geometry
• Friedmann-like universes with torsion
• On Poincaré gauge theory of gravity, its equations of motion, and Gravity Probe B
• Nonsingular Dirac particles in spacetime with torsion
• f(R) cosmology with torsion
• Lorentz invariant dark-spinor and inflation
• Constraining spacetime torsion with the Moon and Mercury
• Kinematics of Einstein-Cartan universes
• Slow-roll inflation in generalized scalar-torsion gravity
• Nonminimal couplings, gravitational waves, and torsion in Horndeski's theory
• Friedmann-like universes with weak torsion: a dynamical system approach
• Non-zero torsion and late cosmology
• Acceleration in Friedmann cosmology with torsion
• Cosmological signatures of torsion and how to distinguish torsion from the dark sector
• Low-redshift constraints on homogeneous and isotropic universes with torsion
• Linear and Second-order Geometry Perturbations on Spacetimes with Torsion
• Homogeneous and Isotropic space-time, Modified torsion field and Complete cosmic scenario

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• Dark energy and accelerating cosmological evolution from osculating Barthel-Kropina geometry
• 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