XIV. Topology and higher symmetries of the two-dimensional non-linear σ-model |
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| Authors: | A D&#x;adda M Lüscher P Di Vecchia |
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| Institution: | The Niels Bohr Institute, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark;NORDITA A, DK-2100 Copenhagen Ø, Denmark |
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| Abstract: | We formulate the O(3) non-linear σ-model and its supersymmetric extension as Abelian gauge theories. As in the Higgs model the instanton number is related to winding properties of the gauge field at infinity. In the new language, a higher symmetry becomes obvious and Pohlmeyer's conserved currents can be derived easily. |
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