Cosmological meaning of the gravitational gauge group
arXiv:1405.5398 · doi:10.1007/s10714-014-1780-5
Abstract
It is shown that among the R+beta S^{abc}S_{abc} models, only the one with beta=1/2 has nonvanishing torsion effect in the Robertson--Walker universe filled with a spin fluid, where S_{abc} denotes torsion. Moreover, the torsion effect in that model is found to be able to replace the big-bang singularity by a big bounce. Furthermore, we find that the model can be obtained under a Kaluza--Klein-like ansatz, by assuming that the gravitational gauge group is the de Sitter group.
arXiv comment9 pages. arXiv admin note: substantial text overlap with arXiv:1402.3650
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