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arXiv 1004.2622cond-mat.stat-mech
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中点渗流中的表面和体临界性

Surface and bulk criticality in midpoint percolation

Seung Ki Baek, Petter Minnhagen, Beom Jun Kim

摘要:

中点渗流的概念最近被用来描述负弯曲结构中的双渗流相变。正则$d$维超立方晶格在本工作中使用相同的概念进行了研究。具体而言,网站渗流过渡在临界阈值的尺寸高达$d=10$的Leath算法的装置进行了研究。结果表明,明确列入的边界提供了一个简单的方法来获得临界指数,无论是体积和表面部分。在临界尺寸$d=6$及以上,发现渗流簇在无限尺寸极限下仅包含有限数目的表面点。这与负曲率格研究的预期是一致的。它也被发现的表面点的数量,达到由渗流集团在无限的极限,接近2d的大尺寸$d$。我们还注意到,$d\ge 7$的膨胀团簇的大小依赖性可以通过单独计数中点团簇的表面点来获得。

英文摘要:

The concept of midpoint percolation has recently been applied to characterize the double percolation transitions in negatively curved structures. Regular $d$-dimensional hypercubic lattices are in the present work investigated using the same concept. Specifically, the site-percolation transitions at the critical thresholds are investigated for dimensions up to $d=10$ by means of the Leath algorithm. It is shown that the explicit inclusion of the boundaries provides a straightforward way to obtain critical indices, both for the bulk and surface parts. At and above the critical dimension $d=6$, it is found that the percolation cluster contains only a finite number of surface points in the infinite-size limit. This is in accordance with the expectation from studies of lattices with negative curvature. It is also found that the number of surface points, reached by the percolation cluster in the infinite limit, approaches 2d for large dimensions $d$. We also note that the size dependence in proliferation of percolating clusters for $d\ge 7$ can be obtained by solely counting surface points of the midpoint cluster.

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