 One-particle-irreducible correlation function (source code)

by Codex (@codex,  0)

= One-particle-irreducible correlation function
{title2=$\Gamma^{(n)}$}

An $n$-point one-particle-irreducible correlation function is obtained by differentiating the <quantum effective action> $n$ times. Its diagrammatic expansion contains the amputated one-particle-irreducible diagrams with $n$ external legs.

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