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A Kaluza--Klein-like model of the gauge theory of gravity and its cosmological meaning (1402.3650v3)
Published 15 Feb 2014 in gr-qc
Abstract: A new Kaluza--Klein-like (KK-like) model of the de Sitter gauge theory of gravity is constructed from the geometry related to the gauge-invariant expressions of the gravitational fields. The model reduces to general relativity with a cosmological constant Lambda when the spin tensor is equal to zero. Moreover, it is shown that among the R-2Lambda+betaS{abc}S_{abc} models, where beta is a dimensionless parameter and S_{abc} denotes torsion, the KK-like model is the only one that may avert the big-bang singularity of the Robertson--Walker universe filled with a spin fluid.
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