YANG-LEE ZEROS OF THE Q-STATE POTTS-MODEL IN THE COMPLEX MAGNETIC-FIELD PLANE

The microcanonical transfer matrix is used to study the distribution o f Yang-Lee zeros of the Q-state Potts model in the complex magnetic fi eld (x = e(beta h)) plane for the first time. Finite size scaling sugg ests that at land below) the critical temperature the zeros lie close to, but not on, the unit circle with the two exceptions of the critica l point x = 1 (h = 0) itself and the zeros in the limit T = 0.