Black hole mergers in quadratic gravity

Observations and deeply theoretical considerationsindicatethat general relativity, our elegant standard model of gravity, requires modifications at high curvatures scales. Candidate theories of quantum gravity, in their low-energy limit, typically predict couplings to additional fields or involve higher curvature terms. At the same time, the breakthrough discovery of gravitational waves has provided a new channel to probe gravity in its most extreme, truly nonlinear regime. Modelling the expected gravitational radiation in extensions of GR enables us to search for -- or place novel observational bounds on -- deviations from our standard model. In this talk I will give an update onthe progress on simulating black-holebinary mergersin quadratic gravity and the understanding of new mathematical challenges such as the well-posedness of the underlying initial value formulation.