2012

f(R) and f(T) theories of modified gravity

Ferraro, Rafael

Understand

We briefly review f(R) theories, both in the metric and Palatini formulations, their scalar-tensor representations and the chameleon mechanism that could explain the absence of perceptible consequences in the Solar System.

We also review f(T) theories, a different approach to modified gravity consisting in a deformation of the teleparallel equivalent of General Relativity.
We show some applications to cosmology and cosmic strings.
As f(R)'s, f(T) theories are not exempted from additional degrees of freedom; we also discuss this still open issue.

Built on

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