Gravitational Waveform from Amplitudes

报告人简介：
Dr. Alessandro Georgoudis is a postdoc in Queen Mary university of London. Prior to
that he was a postdoc at Nordita and at Ecole Normale Superieure. His research interest lies
in amplitudes methods in supersymmetric field theories and gravity.

讲座摘要：
In this talk I will present some recent developments in the study of
classical observables for gravitational waves physics. This topic has received a lot
of attention in the recent years due to the observation of gravitational waves
emitted by black hole mergers. Our approach will be based on quantum scattering
amplitudes methods, which have been developed to study scattering of
fundamental particles. We will describe how the same tools can be used to also
study binary black hole processes in the largely separated and weakly interacting
post-Minkowskian (PM) regime. I will focus in particular on the 2 to 3 amplitude,
which can be connected to the emitted gravitational waveform itself, and after
introducing the amplitude methods used for the one-loop computation I will show
how the choice of the asymptotic BMS frame is crucial for comparing with more
traditional methods (i.e. the multipolar post-Newtonian (PN) expansion).

邀请人：Alexander Ochirov教授