- Sin-Itiro Tomonaga
Infobox Scientist

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name = Sin-Itiro Tomonaga (朝永 振一郎)

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birth_date = Birth date|1906|3|31

birth_place =Tokyo ,Japan

death_date = Death date and age|1979|7|8|1906|3|31

death_place = Tokyo, Japan

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fields =Theoretical physics

workplaces =Institute for Advanced Study

Tokyo University of Education

alma_mater = Kyoto Imperial University

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known_for =Quantum electrodynamics

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awards =Nobel Prize in Physics (1965)

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footnotes =**Sin-Itiro Tomonaga**or**Shinichirō Tomonaga**(朝永 振一郎 "Tomonaga Shin'ichirō",March 31 ,1906 –July 8 ,1979 ) was aJapan esephysicist , influential in the development ofquantum electrodynamics , work for which he was jointly awarded theNobel Prize in Physics in 1965 along withRichard Feynman andJulian Schwinger .**Biography**Tomonoga was born in

Tokyo in 1906. He was the second child and eldest boy of a Japanese philosopher,Sanjūrō Tomonaga . He entered the Kyoto Imperial University in 1926.Hideki Yukawa , also aNobel Prize winner, was one of his classmates duringundergraduate school. During graduate school at the same university, he worked as an assistant in the university for three years. After graduate school, he joined Nishina's group inRiken . In 1937, while working in Leipzig, he collaborated with the research group ofWerner Heisenberg . Two years later, he returned to Japan due to the outbreak of theSecond World War , but finished his doctoral degree on the study of nuclear materials with his thesis on work he had done while in Leipzig.In Japan, he was appointed to a professorship in the Tokyo University of Education (a forerunner of

Tsukuba University ). During the war he studied themagnetron ,meson theory, and his "super-many-time" theory. In 1948, he and his students re-examined a 1939 paper bySidney Dancoff that attempted, but failed, to show that the infinite quantities that arise in QED can be canceled with each other. Tomonaga applied his super-many-time theory and a relativistic method based on the non-relativistic method ofWolfgang Pauli and Fierz to greatly speed up and clarify the calculations. Then he and his students found that Dancoff had overlooked one term in the perturbation series. With this term, the theory gave finite results; thus Tomonaga discovered therenormalization method independently ofJulian Schwinger and calculated physical quantities such as theLamb shift at the same time.In the next year, he was invited by

Robert Oppenheimer to work at theInstitute for Advanced Study in Princeton Township. He studied amany-body problem on the collective oscillations of a quantum-mechanical system. In the following year, he returned to Japan and proposed theTomonaga-Luttinger liquid . In 1965, he was awarded theNobel Prize in Physics , withJulian Schwinger andRichard P. Feynman , for the study of QED, specifically for the discovery of therenormalization method. He died inTokyo in 1979.**References***Schweber, Sylvan S., 1994. "QED and the men who made it : Dyson, Feynman, Schwinger, and Tomonaga". Princeton Univ. Press.

* [*http://nobelprize.org/nobel_prizes/physics/laureates/1965/tomonaga-lecture.html Tomonaga's Nobel Prize Lecture*]**External links*** [

*http://www.nobel.se/physics/laureates/1965/tomonaga-bio.html Nobel Prize biography*]

* [*http://physics.nobel.brainparad.com/shinitiro_tomonaga.html Shinichiro Tomonaga*]

* [*http://holiker.narod.ru/five/tomonaga-lecture.html fundamental work in quantum electrodynamics, with deep-ploughing consequences for the physics of elementary particles.*]

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**Sin-itiro tomonaga**— ou : Shinichirō Tomonaga (朝永 振一郎 Tomonaga Shin ichirō) est un physicien théoricien japonais (31 mars 1906 08 juillet 1979), prix Nobel 1965. Biographie Né à Kyoto, il est le fils aîné d un professeur de philosophie. Principales publications… … Wikipédia en Français**Sin-Itiro Tomonaga**— (朝永 振一郎) Sin Itiro Tomonaga en 1965 Naissance 31 mars 1906 Tōkyō (Empire du Japon) Décès 8 juillet 1979 … Wikipédia en Français**Sin-Itiro Tomonaga**— Shin’ichirō Tomonaga (jap. 朝永 振一郎 Tomonaga Shin’ichirō; * 31. März 1906 in Tokio; † 8. Juli 1979 ebendort) war ein japanischer Physiker. Er erhielt 1965 zusammen mit Richard P. Feynman und J. Schwinger den Physik Nobelpreis „für ihre fundamentale … Deutsch Wikipedia**Tomonaga , Sin-Itiro**— (1906–1979) Japanese theoretical physicist Tomonaga, who was born at Tokyo in Japan, graduated from Kyoto University in 1929 and then went to work in his native city. He remained there for the rest of his academic career, becoming professor of… … Scientists**Tomonaga**— may refer to: *Jacobo Kyushei Tomonaga (1582 1633), a Japanese priest in the Dominican Order of the Catholic Church *Minamoto no Tomonaga (1144 1160), a Minamoto clan samurai of the late Heian period *Sin Itiro Tomonaga (1906 1979), a Japanese… … Wikipedia**Tomonaga**— Sin Itiro … Scientists**Tomonaga Shin'ichirō**— ▪ Japanese physicist Shin ichirō also spelled Sin itiro born March 31, 1906, Kyōto, Japan died July 8, 1979, Tokyo Japanese physicist, joint winner, with Richard P. Feynman (Feynman, Richard P.) and Julian S. Schwinger (Schwinger, Julian… … Universalium**Shinichirou Tomonaga**— Sin Itiro Tomonaga Sin Itiro Tomonaga ou : Shinichirō Tomonaga (朝永 振一郎 Tomonaga Shin ichirō) est un physicien théoricien japonais (31 mars 1906 08 juillet 1979), prix Nobel 1965. Biographie Né à Kyoto, il est le fils aîné d un professeur de… … Wikipédia en Français**Shin'ichirō Tomonaga**— Tomonaga en 1965 Nacimiento 31 de mar … Wikipedia Español**Richard Feynman**— Richard Phillips Feynman Richard Feynman lors d une visite au Fermilab Naissance 11 mai 1918 Queens (New York) (États Unis) Décès … Wikipédia en Français