Equation of state for dark energy in $f(T)$ gravity

By Kazuharu Bamba, Chao-Qiang Geng, Chung-Chi Lee, Ling-Wei Luo. 2010

396 citations recorded by the source corpus.

We study the cosmological evolutions of the equation of state for dark energy wDE in the exponential and logarithmic as well as their combination f(T) theories. We show that the crossing of the phantom divide line of wDE = −1 can be realized in the combined f(T) theory even though it cannot be in the exponential or logarithmic f(T) theory. In particular, the crossing is from wDE > −1 to wDE < −1, in the opposite manner from f(R) gravity models. We also demonstrate that this feature is favored by the recent observational data.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/bd18ce95d47aa7df516f6a40db0b6a0df4a682f0

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In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

Observational constraints on teleparallel dark energy (2011, background): “The first is to replace T by an arbitrary function f(T ) [41, 42, 46–72], similar to f(R) extensions of GR, and obtain new interesting terms in the field equations.”