Cosmological dynamics with propagating Lorentz connection modes of spin zero

被引：53

作者：

Chen, Hsin ^{[1
]}

Ho, Fei-Hung ^{[1
]}

Nester, James M. ^{[1
,2
,3
]}

Wang, Chih-Hung ^{[1
]}

Yo, Hwei-Jang ^{[4
]}

机构：

[1] Natl Cent Univ, Dept Phys, Jhongli 320, Taiwan

[2] Natl Cent Univ, Inst Astron, Jhongli 320, Taiwan

[3] Natl Cent Univ, Ctr Math & Theoret Phys, Jhongli 320, Taiwan

[4] Natl Cheng Kung Univ, Dept Phys, Tainan 701, Taiwan

来源：

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2009年 / 10期

关键词：

modified gravity; gravity; dark energy heory; POINCARE GAUGE-THEORY; FUNDAMENTAL PARTICLES; ACCELERATING UNIVERSE; HAMILTONIAN ANALYSIS; FRIEDMANN EQUATIONS; DARK ENERGY; TORSION; GRAVITY; FIELD; LAGRANGIANS;

D O I：

10.1088/1475-7516/2009/10/027

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

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.

引用

页数：28

共 53 条

[11] Fermion helicity flip induced by torsion field [J].