Abstract
We study conserved (Kawasaki) spin-exchange processes at finite temperature under external non-thermal noise. The dynamics of the total system based on the master equation is formulated in terms of Pauli operators. The result is a nonlinear diffusion equation for the magnetisation density. Already in mean-field approximation the correlation function reveals a stretched exponential behaviour. The critical exponents resulting from a one-loop renormalization group approach will be supported by simulations in one dimension.
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