Departamento de Física Teórica I, Universidad Complutense, E-28040 Madrid, Spain.
Phys Rev Lett. 2013 May 31;110(22):227201. doi: 10.1103/PhysRevLett.110.227201. Epub 2013 May 29.
We solve a long-standing puzzle in statistical mechanics of disordered systems. By performing a high-statistics simulation of the D=3 random-field Ising model at zero temperature for different shapes of the random-field distribution, we show that the model is ruled by a single universality class. We compute the complete set of critical exponents for this class, including the correction-to-scaling exponent, and we show, to high numerical accuracy, that scaling is described by two independent exponents. Discrepancies with previous works are explained in terms of strong scaling corrections.
我们解决了无序系统统计力学中的一个长期存在的难题。通过对不同形状的随机场分布的 D=3 随机场伊辛模型在零温度下进行高统计模拟，我们表明该模型受单一普适类支配。我们计算了该普适类的完整临界指数集，包括修正标度指数，并以高精度数值显示，标度由两个独立的指数描述。与以前的工作的差异可以用强标度修正来解释。
