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arXiv 2009.11209cond-mat.softcond-mat.dis-nncond-mat.mtrl-scicond-mat.stat-mech
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由一次模拟估算的Lennard-Jones液体的结构

Structure of the Lennard-Jones liquid estimated from a single simulation

Shibu Saw, Jeppe C. Dyre

摘要:

结合最近的Piskulich-Thompson方法[Z. A. Piskulich和W. H. Thompson,{ \it J. Chem. Phys.} { \bf 152},011102(2020)],利用同晶理论,从单次模拟中,在温度-密度相图的几乎整个液体区域中的任意状态点处获得单组分Lennard-Jones(LJ)系统的结构。LJ系统具有两个温度范围,其中范特霍夫的假设,能量和熵力是温度无关的是有效的。本文还讨论了利用等容线上两个温度下的结构知识来计算等容线上任意状态点的结构的方法。我们认为,在一般情况下,任何隐藏的标度不变系统的结构服从范特霍夫的假设,在整个温度范围内可以确定在整个液体区域的相图从只有一个单一的模拟。

英文摘要:

Combining the recent Piskulich-Thompson approach [Z. A. Piskulich and W. H. Thompson, {\it J. Chem. Phys.} {\bf 152}, 011102 (2020)] with isomorph theory, from a single simulation, the structure of a single-component Lennard-Jones (LJ) system is obtained at an arbitrary state point in almost the whole liquid region of the temperature-density phase diagram. The LJ system exhibits two temperature range where the van't Hoff's assumption that energetic and entropic forces are temperature independent is valid. A method to evaluate the structure at an arbitrary state point along an isochore from the knowledge of structures at two temperatures on the isochore is also discussed. We argue that, in general, the structure of any hidden scale-invariant system obeying the van't Hoff's assumption in the whole range of temperatures can be determined in the whole liquid region of the phase diagram from only a single simulation.

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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