Strongly anisotropic non-equilibrium phase transition in Ising models with friction

Details Strongly anisotropic non-equilibrium phase transition in Ising models with friction Strongly anisotropic non-equilibrium phase transition in Ising models with friction

2012-01-10

arxiv.org/abs/1201.1998v1

Physics

Condensed Matter

Statistical Mechanics

8 pages, 6 figures

Scientific paper

The non-equilibrium phase transition in driven two-dimensional Ising models with two different geometries is investigated using Monte Carlo methods as well as analytical calculations. The models show dissipation through fluctuation induced friction near the critical point. We first consider high driving velocities and demonstrate that both systems are in the same universality class and undergo a strongly anisotropic non-equilibrium phase transition, with anisotropy exponent \theta=3. Within a field theoretical ansatz the simulation results are confirmed. The crossover from Ising to mean field behavior in dependency of system size and driving velocity is analyzed using crossover scaling. It turns out that for all finite velocities the phase transition becomes strongly anisotropic in the thermodynamic limit.

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