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arXiv 0802.1748cond-mat.stat-mech
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具有负Specific Heat的系统违反热力学第零定律

Violation of the Zeroth Law of Thermodynamics in Systems with Negative Specific Heat

A. Ramirez-Hernandez, H. Larralde, F. Leyvraz

摘要:

我们证明了具有负比热的系统可以违反热力学第零定律。通过数值模拟和使用精确表达式的自由能和微正则熵它表明,如果两个系统具有相同的强度参数,但具有负比热热耦合,他们经历了一个过程中,总熵增加不可逆的。最终的平衡是这样的,出现两个相,也就是说,在两个系统中相同的温度下,子系统具有不同的磁化强度和内能,但可以不同于初始温度。

英文摘要:

We show that systems with negative specific heat can violate the zeroth law of thermodynamics. By both numerical simulations and by using exact expressions for free energy and microcanonical entropy it is shown that if two systems with the same intensive parameters but with negative specific heat are thermally coupled, they undergo a process in which the total entropy increases irreversibly. The final equilibrium is such that two phases appear, that is, the subsystems have different magnetizations and internal energies at temperatures which are equal in both systems, but that can be different from the initial temperature.

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