Dissipative, tidal and spin effects from the eikonal operator

by Carlo Heissenberg (Queen Mary U.)

Wednesday 11 Oct 2023, 14:30 → 15:30 Europe/Rome

P2C (Dipartimento di Fisica e Astronomia - Edificio Paolotti)

The eikonal exponentiation provides a flexible tool to extract the classical limit of scattering amplitudes and to obtain predictions for classical gravitational observables for collisions of compact objects. In this talk, I will discuss how the eikonal phase can be promoted to an operator accounting for gravitational-wave emissions,  and how it can be used to calculate dissipative observables. I will focus in particular on the total angular momentum that a binary system loses to the gravitational field, showing how it can be calculated from the eikonal operator, including the cases of tidally deformable and of spinning compact objects, and discussing the effects of recoil, which becomes relevant in the presence of spin.