253 citations · 559 across the 14 of their papers we have counts for
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hep-th2014★ 19 cited
Inflationary gravitational waves in the effective field theory of modified gravity
Antonio De Felice, Shinji Tsujikawa
In the approach of the effective field theory of modified gravity, we derive the second-order action and the equation of motion for tensor perturbations on the flat isotropic cosmo…
hep-th2012★ 253 cited
Massive gravity: nonlinear instability of the homogeneous and isotropic universe
Antonio De Felice, A. Emir Gumrukcuoglu, Shinji Mukohyama
We argue that all homogeneous and isotropic solutions in nonlinear massive gravity are unstable. For this purpose, we study the propagating modes on a Bianchi type--I manifold. We…