Entropy in Born-Infeld gravity

@article{Ozen2017EntropyIB,
  title={Entropy in Born-Infeld gravity},
  author={Gokcen Deniz Ozen and Sahin Kurekci and Bayram Tekin},
  journal={Physical Review D},
  year={2017},
  volume={96},
  pages={124038}
}
There is a class of higher derivative gravity theories that are in some sense natural extensions of cosmological Einstein's gravity with a unique maximally symmetric classical vacuum and only a massless spin-2 excitation about the vacuum and no other perturbative modes. These theories are of the Born-Infeld determinantal form. We show that the macroscopic dynamical entropy as defined by Wald for bifurcate Killing horizons in these theories are equivalent to the geometric Bekenstein-Hawking… 

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