Short-time scaling via Monte Carlo single spin-flip algorithms for the Baxter-Wu model

The short-time critical dynamics of the Baxter-Wu model is investigated via Monte Carlo simulations using single spin-flip algorithms. The critical dynamic exponents z and θ are estimated and it is shown that the N-fold way provides a reliable estimate for the ratio of the static exponents (2β/ν) and a good confirmation of the short-time scheme. However, we find that the Metropolis and heat-bath algorithms are less satisfactory when used in the Baxter-Wu model to observe the short-time scaling.