QED

Type: Concept

As of November 2026, QED has been mentioned in 2 episodes across 2 podcasts, first heard Jan 2026 on Institute for Advanced Study. Quantum Electrodynamics is discussed as an example theory with a conformal window.

In particle physics, quantum electrodynamics (QED) is the relativistic quantum field theory of electrodynamics. In essence, it describes how light and matter interact and is the first theory where full agreement between quantum mechanics and special relativity is achieved. QED mathematically describes all phenomena involving electrically charged particles interacting by means of exchange of photons and represents the quantum counterpart of classical electromagnetism giving a complete account of