标题： Nishimori点处的临界指数 显示英文标题

标题： Critical exponents at the Nishimori point

摘要： 随机键伊辛模型的Nishimori点是具有强无序的重正化群不动点的原型。 我们表明，从Nishimori线的性质出发，在二维和三维空间中可以确定这一点处的精确关联长度和交叉临界指数。 这些是对于受挫随机磁体的第一个精确指数，这也应与三维无序伊辛模型的精确指数未知这一事实形成对比。 我们的讨论扩展到了更高维度以及非伊辛模型。 显示英文摘要

摘要： The Nishimori point of the random bond Ising model is a prototype of renormalization group fixed points with strong disorder. We show that the exact correlation length and crossover critical exponents at this point can be identified in two and three spatial dimensions starting from properties of the Nishimori line. These are the first exact exponents for frustrated random magnets, a circumstance to be also contrasted with the fact that the exact exponents of the Ising model without disorder are not known in three dimensions. Our considerations extend to higher dimensions and models other than Ising.