Monte Carlo simulations of short-time critical dynamics with a conserved quantity

With Monte Carlo simulations, we investigate short-time critical dynamics of the three-dimensional antiferromagnetic Ising model with a globally conserved magnetization m_s (not the order parameter). From the power law behavior of the staggered magnetization (the order parameter), its second moment and the autocorrelation, we determine all static and dynamic critical exponents as well as the critical temperature. The universality class of m_s=0 is the same as that without a conserved quantity, but the universality class of nonzero m_s is different.