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arXiv 1608.07091cond-mat.stat-mech
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完全图上迷向多数票模型的精确解

Exact solution of the isotropic majority-vote model on complete graphs

Agata Fronczak, Piotr Fronczak

摘要:

各向同性多数票(MV)模型,除了一维的情况下,被认为是非平衡的,违反了细致平衡条件。我们表明,这是不正确的,当模型定义在一个完整的图。在静态区域,全连通图上的MV模型满足细致平衡。我们推导出了在给定自旋组态中找到系统的概率分布的精确表达式。我们表明,它只取决于磁化的绝对值。数值模拟验证了我们的理论预测。

英文摘要:

The isotropic majority-vote (MV) model which, apart from the one-dimensional case, is thought to be non-equilibrium and violating the detailed balance condition. We show that this is not true, when the model is defined on a complete graph. In the stationary regime, the MV model on a fully connected graph fulfills the detailed balance. We derive the exact expression for the probability distribution of finding the system in a given spin configuration. We show that it only depends on the absolute value of magnetization. Our theoretical predictions are validated by numerical simulations.

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