Renormalization
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Renormalization is a collection of techniques in quantum field theory, statistical field theory, and the theory of self-similar geometric structures, that are used to treat infinities arising in calcu
(c) Example of a "penguin" diagram
Quantum electrodynamics
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In particle physics, quantum electrodynamics is the relativistic quantum field theory of electrodynamics. In essence, it describes how light and matter interact and is the first theory where full agre
Renormalization
…unambiguously, a continuum limit must carefully remove "construction scaffolding" of lattices at various scales. Renormalization was first developed in quantum electrodynamics (QED) to make sense of infinite integrals in perturbation theory. Initially viewed as a suspect provisional procedure even by some of its originators…
Paul Dirac
Hans Bethe
Feynman (center) and Oppenheimer (right) at Los Alamos.
Qed rules