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arXiv 0710.5644cond-mat.stat-mechcond-mat.str-el
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热力学中的标度哈密顿量

Thermodynamics from a scaling Hamiltonian

L. A. del Pino, P. Troncoso, S. Curilef

摘要:

定义长程相互作用系统的热力学极限存在问题;因此,这些类型系统的热力学行为是异常的。在目前的工作中,我们审查了一些概念,从广泛和非广泛的热力学观点。我们使用一个模型,其哈密顿量考虑到自旋铁磁耦合在一个链通过一个功率定律,在大粒子间距离$r$作为$1/r^α$为$α\geq0$衰减。在这里,我们回顾一下旧的非扩展缩放。此外,我们提出了一个新的哈密顿量缩放的$2\frac{(N/2)^{1-α}-1}{1-α}$,明确包括对称性的晶格和依赖的大小,$N$,系统。新方法使我们能够改进以前的结果。通过蒙特卡罗模拟进行了数值试验。模型中采用周期性边界条件来消除表面效应。

英文摘要:

There are problems with defining the thermodynamic limit of systems with long-range interactions; as a result, the thermodynamic behavior of these types of systems is anomalous. In the present work, we review some concepts from both extensive and nonextensive thermodynamic perspectives. We use a model, whose Hamiltonian takes into account spins ferromagnetically coupled in a chain via a power law that decays at large interparticle distance $r$ as $1/r^α$ for $α\geq0$. Here, we review old nonextensive scaling. In addition, we propose a new Hamiltonian scaled by $2\frac{(N/2)^{1-α}-1}{1-α}$ that explicitly includes symmetry of the lattice and dependence on the size, $N$, of the system. The new approach enabled us to improve upon previous results. A numerical test is conducted through Monte Carlo simulations. In the model, periodic boundary conditions are adopted to eliminate surface effects.

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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