Speaker
Sonja Klisch
Description
At leading order, the self-force expansion describes the geodesic motion of a massive point particle on a non-trivial background. Consequently, if we seek to calculate classical observables in this expansion using scattering amplitudes, a natural starting point is from a QFT on this non-trivial background. Amplitudes here capture the full non-linearities of the theory, including effects such as memory and gravitational tails. In this talk I will present some recent and upcoming work using this approach, including the calculation of the waveform from massive scattering on a gravitational plane wave, scattering amplitudes on Schwarzschild, and amplitudes in Einstein-Maxwell on strong backgrounds.
