Evaporation/condensation transition of the two dimensional Potts model   in microcanonical ensemble
  Evaporation/condensation transition of the Potts model on square lattice is numerically investigated by the Wang-Landau sampling method. Intrinsically system size dependent discrete transition between supersaturation state and phase-separation state is observed in the microcanonical ensemble by changing constrained internal energy. We calculate the microcanonical temperature, as a derivative of microcanonical entropy, and condensation ratio, and perform a finite size scaling of them to indicate clear tendency of numerical data to converge to the infinite size limit predicted by phenomenological theory for the isotherm lattice gas model. 
Tomoaki Nogawa, Nobuyasu Ito, Hiroshi Watanabe
cond-mat.stat-mech