Infrared modified gravity with propagating torsion: instability of torsionfull de Sitter-like solutions

@article{Nikiforova2018InfraredMG,
  title={Infrared modified gravity with propagating torsion: instability of torsionfull de Sitter-like solutions},
  author={V. Nikiforova and T. Damour},
  journal={Physical Review D},
  year={2018},
  volume={97},
  pages={124014}
}
  • V. Nikiforova, T. Damour
  • Published 2018
  • Physics
  • Physical Review D
  • We continue the exploration of the consistency of a modified-gravity theory that generalizes General Relativity by including a dynamical torsion in addition to the dynamical metric. The six-parameter theory we consider was found to be consistent around arbitrary torsionless Einstein backgrounds, in spite of its containing a (notoriously delicate) massive spin-2 excitation. At zero bare cosmological constant, this theory was found to admit a self-accelerating solution whose exponential expansion… CONTINUE READING

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