The Schwinger model on the torus. (English) Zbl 0971.81067
Summary: The classical and quantum aspects of the Schwinger model on the torus are considered. First we find explicitly all zero modes of the Dirac operator in the topological sectors with nontrivial Chern index and its spectrum. In the second part we determine the regularized effective action and discuss the propagators related to it. Finally we calculate the gauge invariant averages of the fermion bilinears and correlation functions of currents and densities. We show that in the infinite volume limit the well-known result for the chiral condensate can be obtained and the clustering property can be established. We also briefly discuss some new results on the Schwinger model which have been obtained recently.
MSC:
81T10 | Model quantum field theories |
81T15 | Perturbative methods of renormalization applied to problems in quantum field theory |
81T16 | Nonperturbative methods of renormalization applied to problems in quantum field theory |