摘要翻译：
我们研究了单链聚合物在二维细胞中的动力学。我们引入了一个保持链连通性的动力学约束的晶格气模型，并利用该动力学约束模型通过蒙特卡罗模拟研究了聚合物在不同密度下的动力学。即使在接近完全填充构型的密度下，我们发现组成链的单体在时间尺度上以盒尺寸数量级的均方根位移在盒体周围扩散，但聚合物的整体几何形状仍然很大程度上保持不变。为了捕捉这种形状持久性，我们定义了局部切线场，并研究了两次切线-切线相关函数，它表现出类似玻璃的行为。在闭链和开链中，我们通过局部指进事件观察到修复运动和重塑，这导致整体单体位移。
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英文标题：
《Dynamics of single polymers under extreme confinement》
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作者：
Armin Rahmani, Claudio Castelnovo, Jeremy Schmit and Claudio Chamon
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最新提交年份：
2007
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分类信息：

一级分类：Physics        物理学
二级分类：Statistical Mechanics        统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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一级分类：Physics        物理学
二级分类：Soft Condensed Matter        软凝聚态物质
分类描述：Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜，聚合物，液晶，玻璃，胶体，颗粒物质
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英文摘要：
  We study the dynamics of a single chain polymer confined to a two dimensional cell. We introduce a kinetically constrained lattice gas model that preserves the connectivity of the chain, and we use this kinetically constrained model to study the dynamics of the polymer at varying densities through Monte Carlo simulations. Even at densities close to the fully-packed configuration, we find that the monomers comprising the chain manage to diffuse around the box with a root mean square displacement of the order of the box dimensions over time scales for which the overall geometry of the polymer is, nevertheless, largely preserved. To capture this shape persistence, we define the local tangent field and study the two-time tangent-tangent correlation function, which exhibits a glass-like behavior. In both closed and open chains, we observe reptational motion and reshaping through local fingering events which entail global monomer displacement.
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PDF链接：
https://arxiv.org/pdf/704.1663