# Yoichiro Nambu

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**Yoichiro Nambu** (南部 陽一郎 Nambu Yōichirō, 18 January 1921 – 5 July 2015) was a Japanese-American physicist, winner of one-half of the 2008 Nobel Prize in Physics, with the other half shared by two other Japanese physicists.

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## Quotes[edit]

- Ideas and techniques known in quantum electrodynamics have been applied to the Bardeen-Cooper-Schrieffer theory of superconductivity. In an approximation which corresponds to a generalization of the Hartree-Fock fields, one can write down an integral equation defining the self-energy of an electron in an electron gas with phonon and Coulomb interaction. The form of the equation implies the existence of a particular solution which does not follow from perturbation theory, and which leads to the energy gap equation and the quasi-particle picture analogous to Bogolyubov's.
- (February 1960)"Quasi-particles and gauge invariance in the theory of superconductivity".
*Physical Review***117**(3): 648–663. DOI:10.1103/PhysRev.117.648.

- (February 1960)"Quasi-particles and gauge invariance in the theory of superconductivity".

- It was the great multiplicity of the hadrons that led to the formulation of the quark model. Without some organizing principle such a large collecton of particles seemed unwieldy, and the possibility that they might all be elementary offended those who hold the conviction, or at least the fond wish, that nature should be simple.
- "The confinement of quarks." Scientific American 235, no. 5 (1976): 48–63.

## Quotes about Nambu[edit]

- The idea of spontaneous symmetry breaking was introduced into particle physics by Nambu ... in 1960. He suggested that the low mass and low-energy interactions of pions could be understood as a reflection of a spontaneously-broken chiral symmetry, would have been exact if the up and down quarks were massless. His suggestion was that light quarks condense in the vacuum, much like the Cooper pairs of superconductivity. When this happens, the ‘hidden’ chiral symmetry causes the pions’ masses to vanish, and fixes their low-energy couplings to protons, neutrons and each other.
- John Ellis, Mary K. Gaillard, and Dimitri V. Nanopoulos, (2012). "A Historical Profile of the Higgs Boson".
*arXiv:1201.6045v1*: 1–22. (quote from p. 3)

- John Ellis, Mary K. Gaillard, and Dimitri V. Nanopoulos, (2012). "A Historical Profile of the Higgs Boson".

- Yoichiro Nambu was one of the most influential theoretical physicists of the twentieth century. His deep and unexpected insights often took years for others to understand and fully appreciate. They include: spontaneous symmetry breaking, for which he was awarded half of the 2008 Nobel Prize in Physics; the theory of quarks and gluons; and string theory.
- Michael S. Turner in: (27 August 2015)"Yoichiro Nambu (1921–2015)".
*Nature***524**: 416. DOI:10.1038/524416a.

- Michael S. Turner in: (27 August 2015)"Yoichiro Nambu (1921–2015)".

## External links[edit]

- Encyclopedic article on Yoichiro Nambu on Wikipedia
- Media related to Yoichiro Nambu on Wikimedia Commons