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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…
Novel Probes of Gravity and Dark Energy
Bhuvnesh Jain, Austin Joyce, Rodger Thompson +29
The discovery of cosmic acceleration has stimulated theorists to consider dark energy or modifications to Einstein's General Relativity as possible explanations. The last decade ha…
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…
Quantum Corrections in Massive Gravity
Claudia de Rham, Lavinia Heisenberg, Raquel H. Ribeiro
We compute the one-loop quantum corrections to the potential of ghost-free massive gravity. We show how the mass of external matter fields contribute to the running of the cosmolog…
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…
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…