Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1993-11-28
Theor.Math.Phys. 98 (1994) 357-367; Teor.Mat.Fiz. 98 (1994) 509-523
Physics
High Energy Physics
High Energy Physics - Theory
19 pages in Latex, ITFA-93-30
Scientific paper
10.1007/BF01102213
In the Higgs phase we may be left with a residual finite symmetry group H of the condensate. The topological interactions between the magnetic- and electric excitations in these so-called discrete H gauge theories are completely described by the Hopf algebra or quantumgroup D(H). In 2+1 dimensional space time we may add a Chern-Simons term to such a model. This deforms the underlying Hopf algebra D(H) into a quasi-Hopf algebra by means of a 3-cocycle H. Consequently, the finite number of physically inequivalent discrete H gauge theories obtained in this way are labelled by the elements of the cohomology group H^3(H,U(1)). We briefly review the above results in these notes. Special attention is given to the Coulomb screening mechanism operational in the Higgs phase. This mechanism screens the Coulomb interactions, but not the Aharonov-Bohm interactions. (Invited talk given by Mark de Wild Propitius at `The III International Conference on Mathematical Physics, String Theory and Quantum Gravity', Alushta, Ukraine, June 13-24, 1993. To be published in Theor. Math. Phys.)
Bais Alexander F.
Wild Propitius Mark de
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