Cosmological meaning of the gravitational gauge group
May 21, 2014Citations per year
Abstract: (arXiv)
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.Note:
- 9 pages. arXiv admin note: substantial text overlap with arXiv:1402.3650
- 04.50.Kd
- 98.80.Jk
- 04.20.Cv
- Singularity
- Torsion
- De Sitter group
- Gauge theory of gravity
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