Observations and theoretical considerations indicate that general
relativity, our elegant standard model of gravity, may require
modifications at large or high energy 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, strong-field regime.
To facilitate tests of the nonlinear regime of gravity that unfolds
during the collision of compact objects we require numerical relativity
simulations of their late inspiral and merger. In this talk we give a
status update of numerical relativity beyond GR, its modelling
challenges and future directions.
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