John Bardeen

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2026-06-23

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John Bardeen (May 23, 1908 – January 30, 1991) was an American physicist. He is the only person to be awarded the Nobel Prize in Physics twice: first in 1956 with William Shockley and Walter Brattain for their invention of the transistor; and again in 1972 with Leon Cooper and John Robert Schrieffer for their microscopic theory of superconductivity, known as the BCS theory. Born and raised in Wisconsin, Bardeen earned both his bachelor's and master's degrees in electrical engineering from the Un