Modified teleparallel gravity : Inflation without an inflaton

@article{Ferraro2007ModifiedTG,
  title={Modified teleparallel gravity : Inflation without an inflaton},
  author={Rafael Ferraro and Franco Fiorini},
  journal={Physical Review D},
  year={2007},
  volume={75},
  pages={084031}
}
The Born-Infeld strategy to smooth theories having divergent solutions is applied to the teleparallel equivalent of general relativity. Differing from other theories of modified gravity, modified teleparallelism leads to second order equations, since the teleparallel Lagrangian only contains first derivatives of the vierbein. We show that the Born-Infeld-modified teleparallelism solves the particle horizon problem in a spatially flat Friedmann-Robertson-Walker (FRW) universe by providing an… 

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