401 citations · 3.3k across the 52 of their papers we have counts for
52 papers
Solving the initial conditions problem for modified gravity theories
Sam E. Brady, Llibert Aresté Saló, Katy Clough +2
Modified gravity theories such as Einstein scalar Gauss Bonnet (EsGB) contain higher derivative terms in the spacetime curvature in their action, which results in modifications to…
Testing the limits of scalar-Gauss-Bonnet gravity through nonlinear evolutions of spin-induced scalarization
Daniela D. Doneva, Llibert Aresté Saló, Katy Clough +2
Quadratic theories of gravity with second order equations of motion provide an interesting model for testing deviations from general relativity in the strong gravity regime. Howeve…
Puncture gauge formulation for Einstein-Gauss-Bonnet gravity and four-derivative scalar-tensor theories in spacetime dimensions
Llibert Aresté Saló, Katy Clough, Pau Figueras
We develop a modified CCZ4 formulation of the Einstein equations in spacetime dimensions for general relativity plus a Gauss-Bonnet term, as well as for the most general pari…
Modelling self-consistently beyond General Relativity
Ramiro Cayuso, Pau Figueras, Tiago França +1
The majority of extensions to General Relativity display mathematical pathologies (higher derivatives, character change in equations that can be classified within PDE theory, and e…
The endpoint of the Gregory-Laflamme instability of black strings revisited
Pau Figueras, Tiago França, Chenxia Gu +1
We reproduce and extend the previous studies of Lehner and Pretorius of the endpoint of the Gregory-Laflamme instability of black strings in five space-time dimensions. We consider…
Well-posedness of the four-derivative scalar-tensor theory of gravity in singularity avoiding coordinates
Llibert Aresté Saló, Katy Clough, Pau Figueras
We show that the most general scalar-tensor theory of gravity up to four derivatives in dimensions is well-posed in a modified version of the CCZ4 formulation of the Einstein…