Seminarium Teorii Względności i Grawitacji

During this talk we shall discuss the structure of null infinity in asymptotically Minkowskian spacetimes. We will start with introducing basic description of scri: its internal and external geometry and their symmetries which are naturally connected with the radiative modes of gravitational field. We shall continue by quantizing (a'la Fock) said modes which will lead us to the infrared issues and soft hairs in the theory of black holes. The talk will be based mainly on the review paper arXiv:1808.07093v2 [gr-qc].