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arXiv 1009.4358cond-mat.softcond-mat.dis-nn
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无序环境中聚合物的形状各向异性

Shape anisotropy of polymers in disordered environment

Viktoria Blavatska, Wolfhard Janke

摘要:

我们研究了无序环境中结构障碍对长柔性聚合物大分子的尺寸和形状特征的影响。我们使用的模型,自避免随机行走稀释规则格在渗流阈值在空间维度d=2,3。应用剪枝-富集Rosenbluth方法(PERM),数值估计了高分子链构型的平均非球面度A_d和长轴度S等旋转不变普适量。我们的研究结果定量地揭示了由于结构缺陷的存在,大分子的各向异性的程度。

英文摘要:

We study the influence of structural obstacles in a disordered environment on the size and shape characteristics of long flexible polymer macromolecules. We use the model of self-avoiding random walks on diluted regular lattices at the percolation threshold in space dimensions d=2, 3. Applying the Pruned-Enriched Rosenbluth Method (PERM), we numerically estimate rotationally invariant universal quantities such as the averaged asphericity A_d and prolateness S of polymer chain configurations. Our results quantitatively reveal the extent of anisotropy of macromolecules due to the presence of structural defects.

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