737 citations · 3.2k across the 16 of their papers we have counts for
4 papers · 1 filter
A unifying description of dark energy
Jérôme Gleyzes, David Langlois, Filippo Vernizzi
We review and extend a novel approach that we introduced recently, to describe general dark energy or scalar-tensor models. Our approach relies on an ADM formulation based on the h…
Exploring gravitational theories beyond Horndeski
Jérôme Gleyzes, David Langlois, Federico Piazza +1
We have recently proposed a new class of gravitational scalar-tensor theories free from Ostrogradski instabilities, in arXiv:1404.6495. As they generalize Horndeski theories, or "g…
Resilience of the standard predictions for primordial tensor modes
Paolo Creminelli, Jérôme Gleyzes, Jorge Noreña +1
We show that the prediction for the primordial tensor power spectrum cannot be modified at leading order in derivatives. Indeed, one can always set to unity the speed of propagatio…
Healthy theories beyond Horndeski
Jérôme Gleyzes, David Langlois, Federico Piazza +1
We introduce a new class of scalar-tensor theories that extend Horndeski, or "generalized galileon", models. Despite possessing equations of motion of higher order in derivatives,…