Sin-Itiro Tomonaga
Shin'ichir? Tomonaga
Tomonaga.jpg
Born (1906-03-31)March 31, 1906
Tokyo, Japan
Died July 8, 1979(1979-07-08) (aged 73)
Tokyo, Japan
Alma mater Kyoto Imperial University
Known for Quantum electrodynamics
Awards
Scientific career
Fields Theoretical physics
Institutions Leipzig University
Institute for Advanced Study
Tokyo University of Education
RIKEN

Shin'ichir? Tomonaga[1](?? ???, Tomonaga Shin'ichir?, March 31, 1906 - July 8, 1979), usually cited as Sin-Itiro Tomonaga in English,[2] was a Japanese physicist, influential in the development of quantum electrodynamics, work for which he was jointly awarded the Nobel Prize in Physics in 1965[3] along with Richard Feynman and Julian Schwinger.

Biography

Tomonaga was born in Tokyo in 1906. He was the second child and eldest son of a Japanese philosopher, Tomonaga Sanj?r?. He entered the Kyoto Imperial University in 1926. Hideki Yukawa, also a Nobel Prize winner, was one of his classmates during undergraduate school. During graduate school at the same university, he worked as an assistant in the university for three years. In 1931, after graduate school, he joined Nishina's group in Riken. In 1937, while working at Leipzig University (Leipzig), he collaborated with the research group of Werner Heisenberg. Two years later, he returned to Japan due to the outbreak of the Second 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 the magnetron, meson theory, and his super-many-time theory. In 1948, he and his students re-examined a 1939 paper by Sidney 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 of Wolfgang 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 the renormalization method independently of Julian Schwinger and calculated physical quantities such as the Lamb shift at the same time.

In the next year, he was invited by Robert Oppenheimer to work at the Institute for Advanced Study in Princeton. He studied a many-body problem on the collective oscillations of a quantum-mechanical system. In the following year, he returned to Japan and proposed the Tomonaga-Luttinger liquid. In 1965, he was awarded the Nobel Prize in Physics, with Julian Schwinger and Richard P. Feynman, for the study of QED, specifically for the discovery of the renormalization method. He died of throat cancer in Tokyo in 1979.

Tomonaga was married in 1940 to Ry?ko Sekiguchi. They had two sons and one daughter. He was awarded the Order of Culture in 1952, and the Grand Cordon of the Order of the Rising Sun in 1976.

Recognition

Selected publications

Books

Articles

  • Tomonaga, S. "On a Relativistically Invariant Formulation of the Quantum Theory of Wave Fields." Prog. Theor. Phys. 1, 27-42 (1946).
  • Koba, Z., Tati, T. and Tomonaga, S. "On a Relativistically Invariant Formulation of the Quantum Theory of Wave Fields. II." Prog. Theor. Phys. 2, 101-116 (1947).
  • Koba, Z., Tati, T. and Tomonaga, S. "On a Relativistically Invariant Formulation of the Quantum Theory of Wave Fields. III." Prog. Theor. Phys. 2, 198-208 (1947).
  • Kanesawa, S. and Tomonaga, S. "On a Relativistically Invariant Formulation of the Quantum Theory of Wave Fields. IV." Prog. Theor. Phys. 3, 1-13 (1948).
  • Kanesawa, S. and Tomonaga, S. "On a Relativistically Invariant Formulation of the Quantum Theory of Wave Fields. V." Prog. Theor. Phys. 3, 101-113 (1948).
  • Koba, Z. and Tomonaga, S. "On Radiation Reactions in Collision Processes. I." Prog. Theor. Phys. 3, 290-303 (1948).
  • Tomonaga, S. and Oppenheimer, J. R. "On Infinite Field Reactions in Quantum Field Theory." Phys. Rev. 74, 224-225 (1948).

See also

References

  1. ^ For this spelling see: Shigeru Nakayama, Kunio Got?, Hitoshi Yoshioka (eds.), A Social History of Science and Technology in Contemporary Japan: Road to self-reliance 1952-1959, Trans Pacific Press, 2005, p. 723.
  2. ^ Schweber, S. S. (1994). QED and the Men Who Made It: Dyson, Feynman, Schwinger, and Tomonaga. Princeton University Press. p. 252. ISBN 9780691033273. .
  3. ^ Hayakawa, Satio (December 1979). "Obituary: Sin-itiro Tomonaga". Physics Today. 32 (12): 66-68. Bibcode:1979PhT....32l..66H. doi:10.1063/1.2995326. 

Further reading

External links


  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.


Sin-Itiro_Tomonaga



 

Top US Cities