Bimetric gravity from ghost-free massive gravity

@article{Hassan2012BimetricGF,
  title={Bimetric gravity from ghost-free massive gravity},
  author={Sayed Fawad Hassan and Rachel A. Rosen},
  journal={Journal of High Energy Physics},
  year={2012},
  volume={2012},
  pages={1-12}
}
A bstractGenerically, non-linear bimetric theories of gravity suffer from the same Boulware-Deser ghost instability as non-linear theories of massive gravity. However, recently proposed theories of massive gravity have been shown to be ghost-free. These theories are formulated with respect to a flat, non-dynamical reference metric. In this work we show that it is possible to give dynamics to the reference metric in such a way that the consistency of the theory is maintained. The result is a non… Expand
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