Density Perturbation Growth in Teleparallel Cosmology

Abstract

We study the cosmological perturbations in teleparallel dark energy models in which there is a dynamical scalar field with a non-minimal coupling to gravity. We find that the propagating degrees of freedom are the same as in quintessence cosmology despite that variables of the perturbed vierbein field are greater than those in metric theories. We numerically show some evident discrepancy from general relativity in the evolutions of the perturbations on all scales of the universe. We also demonstrate that the gravitational interactions are enhanced during the unique tracker evolutions in these models.

16 pages, 3 figures, revised version accepted for publication in JCAP

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• Generalizations of teleparallel gravity and local Lorentz symmetry
• Phase-Space analysis of Teleparallel Dark Energy
• Conformal transformation in $f(T)$ theories
• Non-minimally coupled canonical, phantom and quintom models of holographic dark energy
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• Observational Constraints on Teleparallel Dark Energy
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• Matter Density Perturbations in Modified Teleparallel Theories
• Coupling constant constraints in a nonminimally coupled phantom cosmology
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Cited by in corpus (23)

• Teleparallel Gravity: From Theory to Cosmology
• Growth of matter perturbations in non-minimal teleparallel dark energy
• Teleparallel quintessence with a nonminimal coupling to a boundary term
• Effective gravitational coupling in modified teleparallel theories
• Linear growth in power law $f(T)$ gravity
• General relativity as an attractor for scalar-torsion cosmology
• Analytic rotating black hole solutions in $N$-dimensional $f(T)$ gravity
• Singularity Problem in Teleparallel Dark Energy Models
• A novel teleparallel dark energy model
• Higgs inflation and teleparallel gravity
• Post-Newtonian Approximation of Teleparallel Gravity Coupled with a Scalar Field
• Slow-roll inflation in generalized scalar-torsion gravity
• Parametrized Post-Newtonian Limit of Teleparallel Dark Energy Model
• Scalar-Tensor Teleparallel Gravity With Boundary Term by Noether Symmetries
• Spherical collapse model and cluster number counts in power law $f(T)$ gravity
• Perfect fluid and F(T) gravity descriptions of inflationary universe and comparison with obervational data
• Phase-space analysis of dark energy models in non-minimally coupled theories of gravity
• Interacting Quintessence in a New Scalar-Torsion Gravity
• Transient acceleration in $f(T)$ gravity
• Teleparallel dark energy in a nonflat universe
• Gravitational Theories with Torsion
• Global portraits of nonminimal teleparallel inflation
• Dynamics of Linear Scalar Perturbation in f(Q)+f(T) class of f(Q,T) gravity