arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1908.06776cond-mat.stat-mech
收藏

用密度分布表示的连续渗流

Continuum percolation expressed in terms of density distributions

Fabian Coupette, Andreas Härtel, Tanja Schilling

摘要:

本文提出了一种新的方法来推导热平衡下两两相互作用的n体系统的连通性。我们制定了一个积分方程,涉及对最近邻的分布连通。对于具有最近邻相互作用的一维系统,最近邻分布又通过简单的积分方程与对关联函数g相关。因此,对于这些系统,我们得到了一个积分方程g的对连通性,这是很容易解决的,甚至分析,如果g是指定的解析。我们证明了各种对电位,包括完全穿透的领域以及不可穿透的领域,只有两个系统的分析结果对连通性存在的程序。然而,该方法不限于一维中的最近邻交互。因此,我们也概述了治疗的外部领域和远程相互作用,我们说明了如何形式主义可以应用到高维系统使用三维理想气体作为一个例子。

英文摘要:

We present a new approach to derive the connectivity properties of pairwise interacting n-body systems in thermal equilibrium. We formulate an integral equation that relates the pair connectedness to the distribution of nearest neighbors. For one-dimensional systems with nearest-neighbor interactions, the nearest-neighbor distribution is, in turn, related to the pair correlation function g through a simple integral equation. As a consequence, for those systems, we arrive at an integral equation relating g to the pair connectedness, which is readily solved even analytically if g is specified analytically. We demonstrate the procedure for a variety of pair-potentials including fully penetrable spheres as well as impenetrable spheres, the only two systems for which analytical results for the pair connectedness exist. However, the approach is not limited to nearest-neighbor interactions in one dimension. Hence, we also outline the treatment of external fields and long-ranged interactions, and we illustrate how the formalism can applied to higher-dimensional systems using the three-dimensional ideal gas as an example.

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。

↑