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Schwinger, Julian Seymour

quantum theory time studied

[ shwing ger] (1918–94) US physicist: one of the founders of quantum electrodynamics (QED).

Schwinger was a graduate of Columbia University, New York, gaining his doctorate at age 20. Research with at the University of California at Berkeley followed and he joined the work on the atomic bomb during 1943–5. In 1946 he became one of Harvard’s youngest-ever professors. As a talented 18-year-old, he had published elegant work on neutron scattering by magnetic materials. Even when he became world-famous among physicists, he remained rather unworldly and preferred to work alone.

Schwinger studied the papers by on the quantum mechanics of the electron and attempted to produce a fully quantum mechanical electrodynamics that was consistent with theory of relativity. , as well as Schwinger, all arrived independently at a correct theory within a short time. The details of how electrons interact with electromagnetic fields were then understood for the first time. Feynman, Tomonaga and Schwinger shared the 1963 Nobel Prize for physics, for this work on QED theory.

Thereafter Schwinger studied synchrotron radiation, which is the particular sort of electromagnetic radiation emitted when a charged particle changes speed or direction in a magnetic field.

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