Recent advances in the scattering amplitude-based approach to the Post-Minkowskian expansion of classical general relativity have demonstrated that this new approach holds the promise of significantly changing the efficiency of computations in general relativity. The results from the amplitude-based approach should be used to predict gravitational waveforms and other observables associated...
The post-Newtonian approximation is an essential ingredient in constructing
waveform templates for binary systems of compact objects to be used in data
analysis of gravitational-wave signals. The phases of such signals, in
particular, must be determined analytically with great accuracy in order to
reduce the biases that may arise in parameter estimation or when combining
analytic results...
Inference from gravitational-wave observations relies on the availability of accurate theoretical waveform models to compare with the data. This contribution considers the rapid generation of surrogate time-domain waveforms consistent with the gravitational-wave signature of the merger of spin-aligned binary black holes. Building on previous works, a machine-learning model is proposed that...
