Cosmological dynamics with propagating Lorentz connection modes of spin zero

Hsin Chen, Fei Hung Ho, James M. Nester, Chih Hung Wang, Hwei Jang Yo

研究成果: Article同行評審

31 引文 斯高帕斯(Scopus)

摘要

The Poincaré gauge theory of gravity has a Lorentz connection with both torsion and curvature. For this theory two good propagating connection modes, carrying spin-0 + and spin-0 -, have been found. The possible effects of the spin-0 + mode in cosmology were investigated in a previous work by our group; there it was found that the 0 + mode could account for the presently accelerating universe. Here, we extend the analysis to also include the spin-0 - mode. The resulting cosmological model has three degrees of freedom. We present both the Lagrangian and Hamiltonian form of the dynamic equations for this model, find the late-time normal modes, and present some numerical evolution cases. In the late time asymptotic regime the two dynamic modes decouple, and the acceleration of the Universe oscillates due to the spin-0 + mode.

原文English
文章編號027
期刊Journal of Cosmology and Astroparticle Physics
2009
發行號10
DOIs
出版狀態Published - 2009 十一月 9

All Science Journal Classification (ASJC) codes

  • 天文和天體物理學

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