37 citations · 73 across the 2 of their papers we have counts for
6 papers
Mild bounds on bigravity from primordial gravitational waves
Matteo Fasiello, Raquel H. Ribeiro
If the amplitude of primordial gravitational waves is measured in the near-future, what could it tell us about bigravity? To address this question, we study massive bigravity theor…
Stable FLRW solutions in Generalized Massive Gravity
Claudia de Rham, Matteo Fasiello, Andrew J. Tolley
We present exact FLRW solutions in generalized massive gravity where the mass parameters are naturally promoted to Lorentz-invariant functions of the Stuckelberg fields. This new d…
Galileon Duality
Claudia de Rham, Matteo Fasiello, Andrew J. Tolley
We show that every Galileon theory admits a dual formulation as a Galileon theory with new operator coefficients. In n dimensions a free scalar field in Minkowski spacetime is dual…
Cosmological Stability Bound in Massive Gravity and Bigravity
Matteo Fasiello, Andrew J. Tolley
We give a simple derivation of a cosmological bound on the graviton mass for spatially flat FRW solutions in massive gravity with an FRW reference metric and for bigravity theories…
Higher derivative theories with constraints : Exorcising Ostrogradski's Ghost
Tai-jun Chen, Matteo Fasiello, Eugene A. Lim +1
We prove that the linear instability in a non-degenerate higher derivative theory, the Ostrogradski instability, can only be removed by the addition of constraints if the original…
Cosmological perturbations in Massive Gravity and the Higuchi bound
Matteo Fasiello, Andrew J. Tolley
In de Sitter spacetime there exists an absolute minimum for the mass of a spin-2 field set by the Higuchi bound m^2 \geq 2H^2. We generalize this bound to arbitrary spatially flat…