Correction of coarse-graining errors by a two-level method: Application to the Asakura-Oosawa model.

Correction of coarse-graining errors by a two-level method: Application to the Asakura-Oosawa model.
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通过两级方法校正粗粒度误差:应用于 Asakura-Oosawa 模型。

DOI:
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发表时间:
2019
影响因子:
4.4
通讯作者:
R. Jack
R. Jack
中科院分区:
化学2区
文献类型:
--
作者:
Hideki Kobayashi;Paul B. Rohrbach;Robert Scheichl;N. Wilding;R. Jack

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我们提出了一种利用粗粒度和细粒度模型的自洽模拟来分析物理系统的特性的方法。该方法使用粗粒度模型对感兴趣的数量进行初步估计,然后通过分析精细系统的特性计算修正。我们通过将其应用于Asakura-Oosawa胶体-聚合物混合物模型来说明该方法。结果表明,该系统的液-气临界点受到三体相互作用的影响,而这些相互作用在相应的粗粒度模型中被忽略了。我们分析了这种效应的大小和三体相互作用的性质。我们还分析了该方法作为相关计算工作量的函数的准确性。
We present a method that exploits self-consistent simulation of coarse-grained and fine-grained models in order to analyze properties of physical systems. The method uses the coarse-grained model to obtain a first estimate of the quantity of interest, before computing a correction by analyzing properties of the fine system. We illustrate the method by applying it to the Asakura-Oosawa model of colloid-polymer mixtures. We show that the liquid-vapor critical point in that system is affected by three-body interactions which are neglected in the corresponding coarse-grained model. We analyze the size of this effect and the nature of the three-body interactions. We also analyze the accuracy of the method as a function of the associated computational effort.
具有耗尽相互作用的锯齿状胶体的多孔液相。
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