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arXiv · 1301.0049

Asymptotic Cosmological Behavior of Scalar-Torsion Mode in Poincare Gauge Theory

Chao-Qiang Geng·Chung-Chi Lee·Huan-Hsin Tseng
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Abstract

We study the cosmological effect of the simple scalar-torsion ($0^+$) mode in Poincaré gauge theory of gravity. We find that for the non-constant (affine) curvature case, the early evolution of the torsion density $ρ_T$ has a radiation-like asymptotic behavior of $a^{-4}$ with $a$ representing the scale factor, along with the stable point of the torsion pressure ($P_T$) and density ratio $P_T/ρ_T\rightarrow 1/3$ in the high redshift regime $(z \gg 0)$, which is different from the previous result in the literature. We use the Laurent expansion to resolve the solution. We also illustrate our result by the execution of numerical computations.

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Chao-Qiang Geng, Chung-Chi Lee, Huan-Hsin Tseng. 2013-01-01. Asymptotic Cosmological Behavior of Scalar-Torsion Mode in Poincare Gauge Theory. https://doi.org/10.1103/physrevd.87.027301

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