MONTE-CARLO STUDY OF THE WIDOM-ROWLINSON FLUID USING CLUSTER-METHODS

The Widom-Rowlinson model of a fluid mixture is studied using a new cl uster algorithm that is an adaptation of the invaded cluster method pr eviously applied to Potts models. The algorithm overcomes the difficul ties of treating continuum hard-core systems and has almost no critica l slowing down. Our estimates of beta/nu and gamma/nu for the two-comp onent fluid are consistent with the Ising universality class in two an d three dimensions. We also present preliminary results for the three- component fluid.