Torsion cosmology and the accelerating universe

Kun Feng Shie, James M. Nester, Hwei Jang Yo

研究成果: Article同行評審

82 引文 斯高帕斯(Scopus)

摘要

Investigations of the dynamic modes of the Poincaré gauge theory of gravity found only two good propagating torsion modes; they are effectively a scalar and a pseudoscalar. Cosmology affords a natural situation where one might see observational effects of these modes. Here, we consider only the "scalar torsion" mode. This mode has certain distinctive and interesting qualities. In particular, this type of torsion does not interact directly with any known matter, and it allows a critical nonzero value for the affine scalar curvature. Via numerical evolution of the coupled nonlinear equations we show that this mode can contribute an oscillating aspect to the expansion rate of the Universe. From the examination of specific cases of the parameters and initial conditions we show that for suitable ranges of the parameters the dynamic "scalar torsion" model can display features similar to those of the presently observed accelerating universe.

原文English
文章編號023522
期刊Physical Review D - Particles, Fields, Gravitation and Cosmology
78
發行號2
DOIs
出版狀態Published - 2008 七月 18

All Science Journal Classification (ASJC) codes

  • 核能與高能物理
  • 物理與天文學(雜項)

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