Torsion cosmology and the accelerating universe

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

Research output: Contribution to journalArticlepeer-review

84 Citations (Scopus)


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.

Original languageEnglish
Article number023522
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number2
Publication statusPublished - 2008 Jul 18

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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