Shin'ichirō Tomonaga developed a relativistically consistent formulation of quantum electrodynamics and a method of renormalization. The physical problem was that naive corrections to an electron's interaction with the electromagnetic field produced divergent intermediate expressions. Relating the theory's parameters to measured mass and electric charge allowed finite predictions to be extracted. His own recollections explain how the relativistic formulation and the treatment of those divergences developed into a calculable quantum theory.[ref]
Development of Quantum Electrodynamics: Personal recollections by Sin-Itiro Tomonaga. 1966 authored lecture, relativistic formulation, electron self-energy and renormalization
Portrait of Shin'ichirō Tomonaga
. Nobel foundation. Public domain in Sweden (PD-Sweden, as stated on Commons). Source usage terms, via Wikimedia Commons. Source.
Shin'ichirō Tomonaga is a prominent Japanese physicist known for his significant contributions to the field of quantum field theory. He was awarded the Nobel Prize in Physics in 1965, jointly with Richard Feynman and Julian Schwinger, for their fundamental work in the development of quantum electrodynamics (QED), which describes how light and matter interact.
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