125 citations · 341 across the 9 of their papers we have counts for
6 papers · 1 filter
Inflaton Dynamics in Higher-Derivative Scalar-Tensor Theories of Gravity
Sam E. Brady, Katy Clough, Pau Figueras +1
During inflation, higher derivative terms in the gravitational action may play a significant role. Building on new stable formulations of four-derivative scalar-tensor theories, we…
Well-posed evolution of field theories with anisotropic scaling: the Lifshitz scalar field in a black hole space-time
Marcelo E. Rubio, Áron D. Kovács, M. Herrero-Valea +2
Partial differential equations exhibiting an anisotropic scaling between space and time -- such as those of Horava-Lifshitz gravity -- have a dispersive nature. They contain higher…
On the construction of asymptotically flat initial data in scalar-tensor effective field theory
Aron D Kovacs
We study the constraint equations for a class of scalar-tensor effective field theories of gravity, including the operators up to derivatives in the action (ST). We…
Well-posed formulation of Lovelock and Horndeski theories
Aron D. Kovacs, Harvey S. Reall
We study the initial value problem for Lovelock and Horndeski theories of gravity. We show that the equations of motion of these theories can be written in a form that, at weak cou…
Well-posed formulation of scalar-tensor effective field theory
Aron D. Kovacs, Harvey S. Reall
Effective field theory provides a way of parameterizing strong-field deviations from General Relativity that might be observable in the gravitational waves emitted in a black hole…
Well-posedness of cubic Horndeski theories
Áron D. Kovács
We study the local well-posedness of the initial value problem for cubic Horndeski theories. Three different strongly hyperbolic modifications of the ADM formulation of the Einstei…