Evaporation-condensation transition of the two-dimensional Potts model in the microcanonical ensemble

Tomoaki Nogawa, Nobuyasu Ito, Hiroshi Watanabe

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The evaporation-condensation transition of the Potts model on a square lattice is numerically investigated by the Wang-Landau sampling method. An 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 the clear tendency of numerical data to converge to the infinite-size limit predicted by phenomenological theory for the isotherm lattice gas model. © 2011 American Physical Society.
Original languageEnglish (US)
JournalPhysical Review E
Issue number6
StatePublished - Dec 5 2011
Externally publishedYes


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