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John Bardeen
John Bardeen
(May 23, 1908 – January 30, 1991) was an American
physicist
and
electrical engineer
, the only person to have won the
Nobel Prize in Physics
twice: first in 1956 with
William Shockley
and
Walter Brattain
for the invention of the
transistor
; and again in 1972 with
Leon N Cooper
and
John Robert Schrieffer
for a fundamental theory of conventional
superconductivity
known as the
BCS theory
.
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