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- W2017834451 abstract "We study the nonequilibrium dynamics of the q-state Potts model following a quench from the high-temperature disordered phase to zero temperature. The time-dependent two-point correlation functions of the order parameter field satisfy dynamic scaling with a length scale L(t)ensuremath{sim}${mathit{t}}^{1/2}$. In particular, the autocorrelation function decays as [L(t)${]}^{mathrm{ensuremath{-}}ensuremath{lambda}(mathit{q})}$. We illustrate these properties by solving exactly the kinetic Potts model in d=1. We then analyze a Langevin equation of an appropriate field theory to compute these correlation functions for general q and d. We establish a correspondence between the two-point correlations of the q-state Potts model and those of a kinetic Ising model evolving with a fixed magnetization (2/q-1). The dynamics of this Ising model is solved exactly in the large q limit and in the limit of a large number of components n for the order parameter. For general q and in any dimension, we introduce a Gaussian closure approximation and calculate within this approximation the scaling functions and the exponent ensuremath{lambda}(q). These are in good agreement with the direct numerical simulations of the Potts model as well as the kinetic Ising model with fixed magnetization. We also discuss the existing and possible experimental realizations of these models." @default.
- W2017834451 created "2016-06-24" @default.
- W2017834451 creator A5047748977 @default.
- W2017834451 creator A5053210310 @default.
- W2017834451 date "1995-07-01" @default.
- W2017834451 modified "2023-09-30" @default.
- W2017834451 title "Coarsening in the<i>q</i>-state Potts model and the Ising model with globally conserved magnetization" @default.
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- W2017834451 doi "https://doi.org/10.1103/physreve.52.244" @default.
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