CRITICAL CORRELATION-FUNCTIONS OF THE POTTS-MODEL

A formalism is presented to calculate the energy correlation functions of the two-dimensional q-state Potts model at its critical and tricri tical transition, based on the Coulomb gas approach. The consistency o f the procedure is verified by comparing alternative prescriptions for the calculation. The four-point function is calculated explicitly, Fr om the four-point function the central charge of the model is computed . (C) 1998 Elsevier Science B.V. All rights reserved.