Interactive physics · Version 1

FeynBridge Lab

A visual workbench for exploring the connection between Feynman diagrams and path-integral expansions.

Draw a diagram. Explore its mathematical expression.

Arrange interaction vertices and external endpoints, connect boson and fermion propagators, and generate the corresponding formal contribution. You can also enter a supported action or path-integral expression to generate diagrams, with LaTeX rendering for readable formulas.

Open FeynBridge Lab

Free to open in your browser. No account required.

01 / Diagram editor

Build visually

Drag nodes into place and connect them directly. Work with boson and fermion lines, interaction vertices, and up to one independent loop.

02 / Two directions

Connect diagrams and formulas

Convert a valid diagram into its formal integral contribution, or generate diagrams from a supported expression and your chosen external fields and perturbative order.

03 / Save your work

Keep exploring

Preview LaTeX as you type, export diagrams as SVG or PNG, and save or load projects as JSON. Your browser also saves your work locally.

What version 1 supports

Real scalar φ⁴ theory and Yukawa φψ̄ψ interactions, using one interaction type at a time. Each diagram supports at most 10 components (vertices plus propagators) and one independent loop.

Input must match a supported model; arbitrary Lagrangians are not parsed. Generated expressions are formal, unevaluated position-space contributions to correlation functions, rather than evaluated or regularized scattering amplitudes.

Explore more

Projects