Three-Particle Correlations in Simple Liquids
摘要
We use video microscopy to follow the phase-space trajectory of a two-dimensional colloidal model liquid and calculate three-point correlation functions from the measured particle configurations. Approaching the fluid-solid transition by increasing the strength of the pair-interaction potential, one observes the gradual formation of a crystal-like local order due to triplet correlations, while being still deep inside the fluid phase. Furthermore, we show that in a strongly interacting system the Born-Green equation can be satisfied only with the full triplet correlation function but not with three-body distribution functions obtained from superposing pair-correlations (Kirkwood superposition approximation).
引用
@article{arxiv.cond-mat/0305176,
title = {Three-Particle Correlations in Simple Liquids},
author = {Klaus Zahn and Georg Maret and Carsten Russ and Hans Hennig von Grunberg},
journal= {arXiv preprint arXiv:cond-mat/0305176},
year = {2009}
}
备注
4 pages, submitted to PRL, experimental paper, 2nd version: Fig.1 and two new paragraphs have been added