John Markus Blatt (23 November 1921, Vienna – 16 March 1990, Haifa) was an Austrian-born American theoretical physicist.
He then went to Massachusetts Institute of Technology, where he wrote, with Victor Weisskopf, the textbook Theoretical Nuclear Physics, which became a standard introduction to the subject.
During the McCarthy era, he was dissatisfied with the political climate in the United States and immigrated to Australia, where in 1953 he joined the faculty of the University of Sydney.
[1] There, in collaboration with Max Robert Schafroth (1923–1959)[2] and Stuart Thomas Butler, he developed a theory that explained superconductivity as a Bose-Einstein condensation of electron pairs.
During his career at the University of New South Wales, he dealt with the three-body nuclear problem, statistical mechanics and applied mathematics such as the theory of optimal control.