Würzburg Seminar on Quantum Field Theory and Gravity

The last decade has experienced a surge of interest in the understanding of physics on null hypersurfaces. From black hole horizons to flat space holography and causal diamonds, passing through the mastery of degrees of freedom and quantization of gravity on a generic finite distance null hypersurface, a unified framework has been put forward. In this talk, we will review the salient latest developments, focusing on the following main achievements. 1) Geometry and conservation laws of a null hyper 2) Gravitational phase space and quantization 3) Asymptotic limit to null infinity and extended BMS anomalies 4) Quantum informational derivation of entropy bounds on black hole horizons 5) Quantum area fluctuations of a causal diamond.