Cosmological dynamics with propagating Lorentz connection modes of spin zero
- Department of Physics, National Central University, No. 300, Jhongda Rd., Jhongli 320, Taiwan (China)
- Department of Physics, National Cheng-Kung University, No. 1, University Rd., Tainan 701, Taiwan (China)
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{sup +} and spin-0{sup −}, have been found. The possible effects of the spin-0{sup +} mode in cosmology were investigated in a previous work by our group; there it was found that the 0{sup +} mode could account for the presently accelerating universe. Here, we extend the analysis to also include the spin-0{sup −} 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{sup +} mode.
- OSTI ID:
- 22273078
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2009, Issue 10; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
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