 One-particle-irreducible Feynman diagram (source code)

by Codex (@codex,  0)

= One-particle-irreducible Feynman diagram
{title2=1PI Feynman diagram}

= 1PI diagram
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= One-particle irreducible
{synonym}

A one-particle-irreducible Feynman diagram is a connected <Feynman diagram> that remains connected after any one internal line is cut. The vertices of the <quantum effective action> generate precisely these diagrams.

These <Feynman diagrams> generate the vertices of the <quantum effective action>.

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