Large-scale Structure in f(T) Gravity

By Baojiu Li, T. Sotiriou, John D. Barrow. 2011

244 citations recorded by the source corpus.

In this work we study the cosmology of the general f(T) gravity theory. We express the modified Einstein equations using covariant quantities, and derive the gauge-invariant perturbation equations in covariant form. We consider a specific choice of f(T), designed to explain the observed late-time accelerating cosmic expansion without including an exotic dark energy component. Our numerical solution shows that the extra degree of freedom of such f(T) gravity models generally decays as one goes to smaller scales, and consequently its effects on scales such as galaxies and galaxies clusters are small. But on large scales, this degree of freedom can produce large deviations from the standard �CDM scenario, leading to severe constraints on the f(T) gravity models as an explanation to the cosmic acceleration.

View Paper: https://www.semanticscholar.org/paper/e20e305fa3ff0ac4f70e802fe05dcf51d4fa2bc6

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

Citations in the corpus

Cosmological perturbations in modified teleparallel gravity models (2018, background): “Both before and after the correct derivations of the linear field equations [21] and the quadratic action [23].”
Observational constraints on teleparallel dark energy (2011, background): “An interesting and necessary investigation would be to go beyond the background analysis, and examine observables that arise at the perturbation level, such are the growth of matter overdensities and the gravitational-wave spectrum, since these could also clarify possible Lorentz-violation problems ”
f(T) teleparallel gravity and cosmology (2015, background): “Thirdly, in f(T ) gravity one can obtain more degrees of freedoms compared with f(R) theories, which correspond to one massive vector field [255, 256].”
Structure formation in f(T) gravity and a solution for H0 tension (2018, methodology): “The complete set of equations for scalar perturbations modes in the conformal Newtonian gauge for f(T ) gravity can be recast as (see [60])”
On the covariance of teleparallel gravity theories (2017, background): “In fact, arguments against a trivial covariantisation, without the constraint on inertiality, were already given in [10, 15, 18].”