Anton Nikolayevich Kapustin (born November 10, 1971, Moscow) is a Russian-Americantheoretical physicist and theEarle C. Anthony Professor of Theoretical Physics at theCalifornia Institute of Technology. His interests lie inquantum field theory andstring theory, and their applications to particle physics and condensed matter theory. He is the son of the pianist-composerNikolai Kapustin.^[1]

Kapustin obtained aB.S. in physics fromMoscow State University in 1993.^{[citation needed]} He received aPh.D. in physics from theCalifornia Institute of Technology in 1997 withJohn Preskill as his advisor.^[2]

He has made several contributions to dualities and other aspects of quantum field theories, in particular topological field theories and supersymmetric gauge theories. WithEdward Witten, he discovered deep connections between the S-duality of supersymmetric gauge theories and thegeometric Langlands correspondence. In recent years, he has focused on mathematical structures in and classification schemes of topological field theories and symmetry-protected topological phases.

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