The Power of Duality -- Exact Results in 4D SUSY Field Theory
Nathan Seiberg
Abstract
Recently the vacuum structure of a large class of four dimensional (supersymmetric) quantum field theories was determined exactly. These theories exhibit a wide range of interesting new physical phenomena. One of the main new insights is the role of ``electric-magnetic duality.'' In its simplest form it describes the long distance behavior of some strongly coupled, and hence complicated, ``electric theories'' in terms of weakly coupled ``magnetic theories.'' This understanding sheds new light on confinement and the Higgs mechanism and uncovers new phases of four dimensional gauge theories. We review these developments and speculate on the outlook.
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