Description
Gravitational waves are now standard tools in modern cosmology, including as probes of fundamental physics. In this talk, I will describe recent results in the efforts to test the symmetries of general relativity using gravitational-waves. Motivated by quantum-gravity phenomenology, I will describe the effective-field theory approach to breaking symmetries and how they can be tested, and I will show state-of-the-art constraints from gravitational-wave data as well as forecasts for future observations. Finally, I will comment on constraints on specific quantum-gravity candidate theories.