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New Kinetic Interactions for Massive Gravity?
Claudia de Rham, Andrew Matas, Andrew J. Tolley
We show that there can be no new Lorentz invariant kinetic interactions free from the Boulware-Deser ghost in four dimensions in the metric formulation of gravity, beyond the stand…
Deconstructing Dimensions and Massive Gravity
Claudia de Rham, Andrew Matas, Andrew J. Tolley
We show that the ghost-free models of massive gravity and their multi-graviton extensions follow from considering higher dimensional General Relativity in Einstein-Cartan form on a…
Superluminality in the Bi- and Multi- Galileon
Paul de Fromont, Claudia de Rham, Lavinia Heisenberg +1
We re-explore the Bi- and Multi-Galileon models with trivial asymptotic conditions at infinity and show that propagation of superluminal fluctuations is a common and unavoidable fe…