Physics Group Meeting

I will review some of the connections between asymptotic symmetry groups, soft theorems for scattering amplitudes, and memory effects. If time permits I will also discuss special boundary operators for asymptotically flat gravity and their relation to soft theorems.Suggested reading:[1] A set of comprehensive lecture notes: https://arxiv.org/abs/1703.05448[2] Christodoulou's nonlinear memory effect: https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.67.1486[3] Thorne's reinterpretation of nonlinear memory: https://journals.aps.org/prd/pdf/10.1103/PhysRevD.45.520[4] The BMS group and gravitational memory: https://link.springer.com/article/10.1007/JHEP01(2016)086[5] Soft theorems and boundary operators: https://arxiv.org/abs/1711.04371