Critical Behaviour of Non-Equilibrium Phase Transitions to Magnetically Ordered States

Details Critical Behaviour of Non-Equilibrium Phase Transitions to Magnetically Ordered States Critical Behaviour of Non-Equilibrium Phase Transitions to Magnetically Ordered States

2001-08-23

arxiv.org/abs/cond-mat/0108379v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevE.65.046110

We describe non-equilibrium phase transitions in arrays of dynamical systems with cubic nonlinearity driven by multiplicative Gaussian white noise. Depending on the sign of the spatial coupling we observe transitions to ferromagnetic or antiferromagnetic ordered states. We discuss the phase diagram, the order of the transitions, and the critical behaviour. For global coupling we show analytically that the critical exponent of the magnetization exhibits a transition from the value 1/2 to a non-universal behaviour depending on the ratio of noise strength to the magnitude of the spatial coupling.

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