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

Hideki Kobayashi, Paul B. Rohrbach, Robert Scheichl, Nigel B. Wilding, Robert L. Jack

Research output: Contribution to journalArticle


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.

Original languageEnglish
Article number144108
Pages (from-to)144108
JournalJournal of Chemical Physics
Issue number14
Early online date8 Oct 2019
Publication statusPublished - 14 Oct 2019

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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