Tests of General Relativity with Einstein Telescope
The study forecasts how third-generation detectors like Einstein Telescope can test General Relativity using binary black hole mergers. By modeling deviations from GR across many events and using a Fisher matrix approach, the authors predict that ET will significantly tighten constraints on gravitational wave parameters, potentially revealing deviations of O(10^-6) or O(10^-3) for specific terms with only a few hundred observations.