The role of three-body interactions in two-dimensional polymer collapse

The role of three-body interactions in two-dimensional polymer collapse
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三体相互作用在二维聚合物塌陷中的作用

DOI:
10.1088/1751-8113/49/21/214001
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发表时间:
2016
期刊:
Mathematical and Theoretical
影响因子:
--
通讯作者:
Bedini A
Bedini A
中科院分区:
--
文献类型:
--
作者:
Bedini A

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二维聚合物塌陷的各种相互作用晶格路径模型表现出不同的临界行为。这种差异一直没有明确的解释。崩塌转变被不同地认为是在杜普兰蒂埃-萨勒尔θ点大学班级(比热尖)、相互作用试验班级(比热发散度),甚至一阶。在这里,我们通过蒙特卡罗模拟研究了蜂窝晶格上DuPlantier-Saleur模型的推广,以及三角形晶格上所谓的顶点相互作用的自回避行走模型的推广(构型实际上是被称为凹槽的受限轨迹)。至关重要的是,对于这两种模型,我们都有三体和两体的相互作用,而且是显式的和不同的权重。我们发现,当考虑这些更大的两参数空间时,这两个模型具有相似的相图。它们展示了对于高三体相互作用,崩塌转变为一级的区域和崩塌为二级的区域。我们猜想分离这两类崩溃的一个更高阶多重临界点。这两个模型中的二阶线是否在所有参数值的DUPLANTiER-SALEURθ-POINT大学类中仍有待测试。
Various interacting lattice path models of polymer collapse in two dimensions demonstrate different critical behaviours. This difference has been without a clear explanation. The collapse transition has been variously seen to be in the Duplantier–Saleur θ-point university class (specific heat cusp), the interacting trail class (specific heat divergence) or even first-order. Here we study via Monte Carlo simulation a generalisation of the Duplantier–Saleur model on the honeycomb lattice and also a generalisation of the so-called vertex-interacting self-avoiding walk model (configurations are actually restricted trails known as grooves) on the triangular lattice. Crucially for both models we have three-and two-body interactions explicitly and differentially weighted. We show that both models have similar phase diagrams when considered in these larger two-parameter spaces. They demonstrate regions for which the collapse transition is first-order for high three-body interactions and regions where the collapse is second order. We conjecture a higher order multiple critical point separating these two types of collapse. It remains to be tested whether the second order lines in both models are in the Duplantier–Saleur θ-point university class for all values of the parameters.
d=2 在相关和不相关空缺上自我回避行走的边界临界行为
DOI: 10.1007/bf01052749
发表时间: 1993
影响因子: 1.6
作者:
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通讯作者: C. Vanderzande
DOI: 10.1103/physreve.82.031103
发表时间: 2010-09-01
期刊: PHYSICAL REVIEW E
影响因子: 2.4
作者:
Doukas, Jason;Owczarek, Aleksander L.;Prellberg, Thomas
通讯作者: Prellberg, Thomas
DOI: 10.1103/physreve.84.032102
发表时间: 2011-09-30
期刊: PHYSICAL REVIEW E
影响因子: 2.4
作者:
Foster, D. P.
通讯作者: Foster, D. P.
方晶格上 O(n) 循环模型中的类伊辛跃迁。
DOI: 10.1103/physreve.87.052118
发表时间: 2013
期刊: Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子: --
作者:
Z. Fu;Wenan Guo;H. Blöte
通讯作者: H. Blöte
DOI: 10.1103/physrevlett.59.539
发表时间: 1987-08-03
影响因子: 8.6
作者:
DUPLANTIER, B;SALEUR, H
通讯作者: SALEUR, H