Cosmological dynamics with propagating Lorentz connection modes of spin zero

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题名:	Cosmological dynamics with propagating Lorentz connection modes of spin zero
作者:	Chen,H;Ho,FH;Nester,JM;Wang,CH;Yo,HJ
贡献者:	物理研究所
关键词:	POINCARE GAUGE-THEORY;FUNDAMENTAL PARTICLES;DARK ENERGY;ACCELERATING UNIVERSE;HAMILTONIAN ANALYSIS;FRIEDMANN EQUATIONS;TORSION FIELD;GRAVITY;CONSTANT;LAGRANGIANS
日期:	2009
上传时间:	2010-07-08 13:59:13 (UTC+8)
出版者:	中央大學
摘要:	The Poincare 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.
關聯:	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
显示于类别:	[物理研究所] 期刊論文

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