Cosmological meaning of the gravitational gauge group
General Relativity and Quantum Cosmology
2014-08-22 v2
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.
Keywords
Cite
@article{arxiv.1405.5398,
title = {Cosmological meaning of the gravitational gauge group},
author = {Jia-An Lu},
journal= {arXiv preprint arXiv:1405.5398},
year = {2014}
}
Comments
9 pages. arXiv admin note: substantial text overlap with arXiv:1402.3650