QED Feynman Diagram Explorer

A catalog of Feynman diagrams for electron-only QED, with full amplitude chains from diagram to number.

Quantum electrodynamics is the most precisely tested theory in the history of science—its predictions agree with experiment to better than one part in a trillion. This site shows how those predictions are computed: the complete chain from Feynman diagram to physical number, for every diagram in the simplest QED.

Explore the catalog

The catalog contains 23 diagrams across 34 processes, with computational chains showing every step from diagram to number.

Processes

34 processes organized by external legs—what comes in, what goes out.

Diagrams

23 diagrams with SVGs, amplitude chains, and divergence classification.

Topologies

The shapes of Feynman diagrams: s-channel, bubble, triangle, box, and more.

Divergences

UV, IR, and finite—the divergence structure of loop diagrams and how they are resolved.

Sample diagrams

Bare electron propagator

tree finite

Bare photon propagator

tree finite

Bare vertex

tree finite

Bhabha s-channel

tree finite

Bhabha t-channel

tree finite

Compton s-channel

tree finite

See all 23 diagrams →