title: Short-time critical dynamics of the Baxter-Wu model.
abstract: We study the early time behavior of the Baxter-Wu model, an Ising model with three-spin interactions on a triangular lattice. Our estimates for the dynamic exponent z are compatible with results recently obtained for two models which belong to the same universality class of the Baxter-Wu model: the two-dimensional four-state Potts model and the Ising model with three-spin interactions in one direction. However, our estimates for the dynamic exponent theta of the Baxter-Wu model are completely different from the values obtained for those models. This discrepancy could be related to the absence of a marginal operator in the Baxter-Wu model.
authors.affiliation: Departamento de Física e Matemática, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Avenida Bandeirantes, 3900-CEP-14040-901, Ribeirão Preto, São Paulo, Brazil. everaldo@dfm.ffclrp.usp.br
authors.forename: Everaldo
authors.initials: E
authors.lastname: Arashiro
authors.forename: J R Drugowich
authors.initials: JR
authors.lastname: de Felício