The rise of a tensor instability in Eddington-inspired gravity
arXiv:1301.5264
Abstract
In this work an extension to Eddington's gravitational action is analyzed. We consider the tensor perturbations of a FLRW space-time in the Eddington regime in where the tensor mode is linearly unstable deep and the resulting modifications to Einstein regime are quite strong.
arXiv comment2 pages, to appear in the Proceedings of the 13th Marcel Grossman Meeting (Stockholm, Sweden, July 1-7 2012), invited talk at the Parallel Session AT4 "Modify Gravity"