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arXiv 1202.0459cond-mat.stat-mechphysics.chem-ph
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液体热力学的声子理论

The phonon theory of liquid thermodynamics

Dima Bolmatov, Vadim Brazhkin, Kostya Trachenko

摘要:

物质的热容量被认为是其最重要的属性,因为它包含有关系统的自由度以及系统运行的机制(经典或量子)的信息。热容在气体和固体中是很好理解的,但在物质的第三种状态,液体中不是,因此在物理教科书中没有讨论。可察觉的困难是,液体中的相互作用是强的和系统特定的,这意味着能量强烈地依赖于液体类型,因此,液体能量不能以一般形式计算。在这里,我们开发了一个声子理论的液体,这个问题是避免的。该理论涵盖了经典和量子两种体系。我们证明了21种液体,包括贵金属,分子和氢键网络液体在很宽的温度和压力范围内的计算和实验的热容良好的协议。

英文摘要:

Heat capacity of matter is considered to be its most important property because it holds information about system's degrees of freedom as well as the regime in which the system operates, classical or quantum. Heat capacity is well understood in gases and solids but not in the third state of matter, liquids, and is not discussed in physics textbooks as a result. The perceived difficulty is that interactions in a liquid are both strong and system-specific, implying that the energy strongly depends on the liquid type and that, therefore, liquid energy can not be calculated in general form. Here, we develop a phonon theory of liquids where this problem is avoided. The theory covers both classical and quantum regimes. We demonstrate good agreement of calculated and experimental heat capacity of 21 liquids, including noble, metallic, molecular and hydrogen-bonded network liquids in a wide range of temperature and pressure.

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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