Bi-local Approach to Geometrical Optics in General Relativity

Explore a 35-minute conference talk from the Workshop on "Lensing and Wave Optics in Strong Gravity" that presents an alternative approach to studying optical properties of spacetimes using bi-local geodesic operators instead of traditional null congruences. Discover how the bi-local formalism simplifies the derivation of important results in geometrical optics in General Relativity, including a universal inequality between parallax distance and angular diameter distance that holds in spacetimes satisfying the null energy condition. Learn from physicist Mikołaj Korzyński's presentation at the Erwin Schrödinger International Institute for Mathematics and Physics as part of their December 2024 workshop series.