New types of $f(T)$ gravity

Details New types of $f(T)$ gravity New types of $f(T)$ gravity

2010-07-21

arxiv.org/abs/1007.3571v3

Eur. Phys. J. C 71, 1797 (2011)

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, 9 figures, some changes are made

Scientific paper

10.1140/epjc/s10052-011-1797-9

Recently $f(T)$ theories based on modifications of teleparallel gravity where torsion is the geometric object describing gravity instead of curvature have been proposed to explain the present cosmic accelerating expansion. The field equations are always second order, remarkably simpler than $f(R)$ theories. In analogy to the $f(R)$ theory, we consider here three types of $f(T)$ gravity, and find that all of them can give rise to cosmic acceleration with interesting features, respectively.

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