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arXiv 0802.3600cond-mat.stat-mech
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Tsallis熵的微正则方程

Microcanonical equations for the Tsallis entropy

J. Carrete, L. M. Varela, L. J. Gallego

摘要:

从非广延Tsallis熵泛函出发,导出了适用于分子动力学模拟的系统热力学性质的微正则方程。温度的两种可能的定义,通常的一个和一个“物理”的修改,满足热力学第零定律,被认为是,从两个选择的结果进行了比较。结果为理想气体使用的第一个定义的温度提供和讨论与文献中报道的典型结果。第二种选择使大多数公式与它们的推广形式(香农-玻尔兹曼-吉布斯)保持不变。

英文摘要:

Microcanonical equations for several thermodynamic properties of a system, suitable for molecular dynamics simulations, are derived from the nonextensive Tsallis entropy functional. Two possible definitions of temperature, the usual one and a ``physical'' modification which satisfies the zeroth law of thermodynamics, are considered, and the results from both choices are compared. Results for the ideal gas using the first definition of temperature are provided and discussed in relation with the canonical results reported in the literature. The second choice leaves most formulae unchanged from their extensive (Shannon-Boltzmann-Gibbs) form.

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