95 citations · 119 across the 4 of their papers we have counts for
Showing 2004Show all
2 papers · 1 filter
hep-th2004★ 95 cited
Ghost Constraints on Modified Gravity
Alvaro Nunez, Slava Solganik
We show that general infrared modifications of the Einstein-Hilbert action obtained by addition of curvature invariants are not viable. These modifications contain either ghosts or…
hep-th2004★ 19 cited
The content of f(R) gravity
Alvaro Nunez, Slava Solganik
We analyze the propagating degrees of freedom in gravity models where the scalar curvature in the action is replaced by a generic function of the curvature. That these gravi…