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

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arxiv 1011.0508 v2 pith:L3IUDRBH submitted 2010-11-02 astro-ph.CO gr-qc

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

classification astro-ph.CO gr-qc
keywords mathrmcrossingdarkenergyequationexponentialgravitylogarithmic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the cosmological evolutions of the equation of state for dark energy $w_{\mathrm{DE}}$ in the exponential and logarithmic as well as their combination $f(T)$ theories. We show that the crossing of the phantom divide line of $w_{\mathrm{DE}} = -1$ 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 $w_{\mathrm{DE}} > -1$ to $w_{\mathrm{DE}} < -1$, in the opposite manner from $f(R)$ gravity models. We also demonstrate that this feature is favored by the recent observational data.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Quasinormal modes of the thick braneworld in $f(T)$ gravity

    gr-qc 2026-04 unverdicted novelty 5.0

    In a thick braneworld model with f(T) = T + α T², the parameter α induces brane splitting and alters the decay rates of quasinormal modes, with two numerical methods agreeing on the low-overtone spectrum.

  2. Modified Gravity and Cosmology

    astro-ph.CO 2011-06 unverdicted novelty 2.0

    A comprehensive review of modified gravity theories and their cosmological consequences, including a parameterized post-Friedmannian formalism for constraining deviations from General Relativity.