Multiscale coarse-graining and structural correlations: Connections to liquid-state theory

W. G. Noid, Jhih-Wei Chu, Gary S. Ayton, Gregory A. Voth*

*Corresponding author for this work

研究成果: Article同行評審

155 引文 斯高帕斯(Scopus)

摘要

A statistical mechanical framework elucidates the significance of structural correlations between coarse-grained (CG) sites in the multiscale coarse-graining (MS-CG) method (Izvekov, S.; Voth, G. A. J. Phys. Chem. B 2005, 109, 2469; J. Chem. Phys. 2005, 123, 134105). If no approximations are made, then the MS-CG method yields a many-body multidimensional potential of mean force describing the interactions between CG sites. However, numerical applications of the MS-CG method typically employ a set of pair potentials to describe nonbonded interactions. The analogy between coarse-raining and the inverse problem of liquid-state theory clarifies the general significance of three-particle correlations for the development of such CG pair potentials. It is demonstrated that the MS-CG methodology incorporates critical three-body correlation effects and that, for isotropic homogeneous systems evolving under a central pair potential, the MS-CG equations are a discretized representation of the well-known Yvon-Born-Green equation. Numerical calculations validate the theory and illustrate the role of these structural correlations in the MS-CG method.

原文English
頁(從 - 到)4116-4127
頁數12
期刊Journal of Physical Chemistry B
111
發行號16
DOIs
出版狀態Published - 1 四月 2007

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