Einstein's Other Gravity and the Acceleration of the Universe

May, 2010
7 pages
Published in:
  • Phys.Rev.D 81 (2010) 127301,
  • Phys.Rev.D 82 (2010) 109902 (erratum)
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Abstract: (arXiv)
Spacetime curvature plays the primary role in general relativity but Einstein later considered a theory where torsion was the central quantity. Just as the Einstein-Hilbert action in the Ricci curvature scalar R can be generalized to f(R) gravity, we consider extensions of teleparallel, or torsion scalar T, gravity to f(T) theories. The field equations are naturally second order, avoiding pathologies, and can give rise to cosmic acceleration with unique features.
  • 04.50.Kd
  • 98.80.-k
  • 99.10.Cd
  • expansion: acceleration
  • action: Einstein-Hilbert
  • curvature: scalar
  • gravitation: f(R)
  • curvature: Ricci
  • torsion
  • general relativity