Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1993-01-11
Phys.Lett.B311:137-146,1993
Physics
High Energy Physics
High Energy Physics - Theory
12 pages, Latex
Scientific paper
10.1016/0370-2693(93)90546-T
We find an explicit solution of the Schr\"odinger equation for a Chern-Simons theory coupled to charged particles on a Riemann surface, when the coefficient of the Chern-Simons term is a rational number (rather than an integer) and where the total charge is zero. We find that the wave functions carry a projective representation of the group of large gauge transformations. We also examine the behavior of the wave function under braiding operations which interchange particle positions. We find that the representation of both the braiding operations and large gauge transformations involve unitary matrices which mix the components of the wave function. The set of wave functions are expressed in terms of appropriate Jacobi theta functions. The matrices form a finite dimensional representation of a particular (well known to mathematicians) version of the braid group on the Riemann surface. We find a constraint which relates the charges of the particles, $q$, the coefficient of the Chern-Simons term, $k$ and the genus of the manifold, $g$: $q^2(g-1)/k$ must be an integer. We discuss a duality between large gauge transformations and braiding operations.
Bergeron Mario
Eliezer David
Semenoff Gordon
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