Which American physicist shared the 1965 Nobel Prize in Physics with Feynman?

Which American physicist shared the 1965 Nobel Prize in Physics with Feynman? Julian Schwinger shared it with him.

Schwinger, an American theoretical physicist born in New York City in 1918, was recognized alongside Feynman and Japan’s Shin’ichirō Tomonaga. The three were honored “for their fundamental work in quantum electrodynamics,” or QED, the theory describing electromagnetic interactions involving charged particles and light.

Their approaches differed considerably. Feynman developed his intuitive space-time formulation and celebrated diagrams, while Schwinger used a more formal operator-based method. Freeman Dyson later showed that these apparently different formulations were mathematically equivalent, helping unite the methods into a powerful framework.

A common mix-up is to name Tomonaga, who also shared the prize, but the question asks for the American physicist. John Bardeen won Physics Nobels in 1956 and 1972, whereas Weinberg and Gell-Mann received their Physics prizes in other years.