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arXiv 2409.02461cond-mat.soft
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软排斥聚合物混合物中的相分离:基础及其对染色质组织的启示

Phase separation in soft repulsive polymer mixtures: foundation and implication for chromatin organization

Naoki Iso, Yuki Norizoe, Takahiro Sakaue

AI总结:

本文提出一种超粗粒化模型,将聚合物表示为可重叠的介观软珠,基于平均场理论研究均聚物混合物的相分离行为,并与数值模拟对比揭示混溶性相图的普适特征,进而将分析推广到随机共聚物体系,为细胞核内染色质组织提供理论启示。

摘要:

鉴于长度尺度范围广泛,聚合物系统的分析通常需要粗粒化处理,根据所研究的现象,可能存在不同层次的描述。在此,我们提供一种超粗粒化描述,其中聚合物被表示为一连串介观软珠,这些软珠允许彼此重叠。随后,我们基于平均场理论研究了此类均聚物混合物中的相分离行为,并与数值模拟进行比较,讨论了混溶性相图的普适性方面。我们还讨论了将该分析扩展到涉及随机共聚物的混合物,这在细胞核内染色质组织的背景下可能具有重要意义。

英文摘要:

Given the wide range of length scales, the analysis of polymer systems often requires coarse-graining, for which various levels of description may be possible depending on the phenomenon under consideration. Here, we provide a super-coarse grained description, where polymers are represented as a succession of mesosopic soft beads which are allowed to overlap with others. We then investigate the phase separation behaviors in a mixture of such homopolymers based on mean-field theory, and discuss universal aspects of the miscibility phase diagram in comparison with the numerical simulation. We also discuss an extension of our analysis to mixtures involving random copolymers, which might be interesting in the context of chromatin organization in a cell nucleus.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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