Dirac Medallists 1989

John H. Schwarz (L), Abdus Salam and Michael B. GreenJohn H. Schwarz (L), Abdus Salam and Michael B. Green

John H. Schwarz, California Institute of Technology, Pasadena, USA, and

Michael B. Green, Queen Mary College, London, UK (at the time of the award)

for their basic contributions to the development of superstring theory. Most significant was their discovery that chiral gauge anomalies are absent for a class of ten dimensional superstring theories. This provided a strong indication that superstring theory with a specific gauge symmetry may provide a consistent unified quantum theory of the fundamental forces including gravity. It led to an explosion of interest in string theory which has already spurred remarkable advances both in mathematical physics and in pure mathematics.

Michael B. Green

John H. Schwarz

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