Corpus ID: 220546302

A simple parity violating gravity model without ghost instability

@inproceedings{Li2020ASP,
  title={A simple parity violating gravity model without ghost instability},
  author={M. Li and Haomin Rao and D. Zhao},
  year={2020}
}
  • M. Li, Haomin Rao, D. Zhao
  • Published 2020
  • Physics
  • In this paper we consider a parity violating gravity model without higher derivatives, thus ghost free. This model is constructed from the tetrad and its derivatives and coupled to a dynamical scalar field, like axion. It can be reduced from the Nieh-Yan term within the framework of teleparallel gravity. We apply this model to cosmology and investigate its consequences on cosmological perturbation theory. We find that the coupled dynamical scalar field lost its independent dynamics at the… CONTINUE READING