Source: wikibot/tadpole-physics
= Tadpole (physics)
{wiki=Tadpole_(physics)}
In physics, a "tadpole" typically refers to a specific kind of diagram used in quantum field theory, especially in the context of perturbation theory in quantum electrodynamics and other quantum field theories. The term is most often associated with Feynman diagrams. In this context, a tadpole diagram represents a one-point function or a loop diagram that has one external vertex and a loop.