arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1802.02810cond-mat.stat-mech
收藏

Potential Energy TIP4P/2005水景观

Potential Energy Landscape of TIP4P/2005 water

Philip H. Handle, Francesco Sciortino

摘要:

我们报告了一个详尽的数值研究的势能景观的TIP 4P/2005,最准确的刚性水模型之一的统计特性。我们表明,在该地区的平衡配置可以产生,高斯景观描述是能够正确地描述模型的属性。我们还发现,景观属性的体积依赖性是一致的,在相图中的密度最大值的轨迹的存在。该状态方程精确地再现了TIP 4P/2005压力-体积曲线,提供了一个合理的外推自由能在低T。一个正压液-液临界点的预测所产生的自由能。

英文摘要:

We report an exhaustive numerical study of the statistical properties of the potential energy landscape of TIP4P/2005, one of the most accurate rigid water models. We show that, in the region where equilibrated configurations can be generated, a Gaussian landscape description is able to properly describe the model properties. We also find that the volume dependence of the landscape properties is consistent with the existence of a locus of density maxima in the phase diagram. The landscape-based equation of state accurately reproduces the TIP4P/2005 pressure-vs-volume curves, providing a sound extrapolation of the free-energy at low T. A positive-pressure liquid-liquid critical point is predicted by the resulting free-energy.

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。

↑