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arXiv 1003.1308cond-mat.stat-mech
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具有两个吸收态的广义接触过程的相变

Phase transitions of the generalized contact process with two absorbing states

Man Young Lee, Thomas Vojta

摘要:

利用大规模蒙特卡罗模拟研究了一维空间中具有两个吸收态的广义接触过程。将非活性区域之间活性位点的生成速率作为独立参数处理,可以得到丰富的相图。除了传统的活动和非活动阶段,我们发现一个参数区域,简单的接触过程是不活跃的,但在非活动域之间的边界处的无穷小的创建率是足够的系统进入活动阶段。因此,广义接触过程具有两条不同的相变线。将它们分开的点与多临界点有一些共同的特征。我们还详细研究了这些转变的临界行为及其普遍性。

英文摘要:

We investigate the generalized contact process with two absorbing states in one space dimension by means of large-scale Monte-Carlo simulations. Treating the creation rate of active sites between inactive domains as an independent parameter leads to a rich phase diagram. In addition to the conventional active and inactive phases we find a parameter region where the simple contact process is inactive, but an infinitesimal creation rate at the boundary between inactive domains is sufficient to take the system into the active phase. Thus, the generalized contact process has two different phase transition lines. The point separating them shares some characteristics with a multicritical point. We also study in detail the critical behaviors of these transitions and their universality.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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