Julian Seymour Schwinger was a Nobel Prize winning American theoretical physicist. He is best known for his work on quantum electrodynamics , in particular for developing a relativistically invariant perturbation theory, and for renormalizing QED to one loop order. Schwinger was a physics professor at several universities.
Schwinger is recognized as one of the greatest physicists of the twentieth century, responsible for much of modern quantum field theory, including a variational approach, and the equations of motion for quantum fields. He developed the first electroweak model, and the first example of confinement in 1+1 dimensions. He is responsible for the theory of multiple neutrinos, Schwinger terms, and the theory of the spin-3/2 field. Wikipedia
Quantum Mechanics - Symbolism of Atomic Measurements (2001) p. 24 f.
as quoted by Sameer Shah in "If you can't join 'em, beat 'em": Julian Schwinger's Conflicts in Physics. Directions in Cultural History, The UCLA Historical Journal, Volume 21, 2005-2006, p. 50
Einstein's Legacy: The Unity of Space and Time (2002) p. 2
