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arXiv · 1111.1801

de Sitter Gauge Theory of Gravity: An Alternative Torsion Cosmology

Xi-Chen Ao·Xin-Zhou Li
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Abstract

A new cosmological model based on the de Sitter gauge theory (dSGT) is studied in this paper. By some transformations, we find, in the dust universe, the cosmological equations of dSGT could form an autonomous system. We conduct dynamics analysis to this system, and find 9 critical points, among which there exist one positive attractor and one negative attractor. The positive attractor shows us that our universe will enter a exponential expansion phase in the end, which is similar to the conclusion of $Λ$CDM. We also carry out some numerical calculations, which confirms the conclusion of dynamics analysis. Finally, we fit the model parameter and initial values to the Union 2 SNIa dataset, present the confidence contour of parameters and obtain the best-fit values of parameters of dSGT.

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Xi-Chen Ao, Xin-Zhou Li. 2011-11-08. de Sitter Gauge Theory of Gravity: An Alternative Torsion Cosmology. https://doi.org/10.1088/1475-7516%2F2011%2F10%2F039

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