Cosmological dynamics with propagating Lorentz connection modes of spin zero

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/38919

Title:	Cosmological dynamics with propagating Lorentz connection modes of spin zero
Authors:	Chen,H;Ho,FH;Nester,JM;Wang,CH;Yo,HJ
Contributors:	物理研究所
Keywords:	POINCARE GAUGE-THEORY;FUNDAMENTAL PARTICLES;DARK ENERGY;ACCELERATING UNIVERSE;HAMILTONIAN ANALYSIS;FRIEDMANN EQUATIONS;TORSION FIELD;GRAVITY;CONSTANT;LAGRANGIANS
Date:	2009
Issue Date:	2010-07-08 13:59:13 (UTC+8)
Publisher:	中央大學
Abstract:	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.
Relation:	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Appears in Collections:	[Graduate Institute of Physics] journal & Dissertation

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