修正费米-哈伯德模型的热力学

arXiv - PHYS - Quantum Physics Pub Date : 2024-09-16 DOI:arxiv-2409.11180

Moorad Alexanian

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引用次数: 0

摘要

最近引入的递推关系解析应用于费米-哈巴德模型，产生了一个可溶模型，并在此用于计算几个热力学观测值。应用了每个位点单位密度（密度 =1）的约束条件，并将部分结果与未施加该约束条件的情况进行了比较。修改后的模型表现出连续相变（二阶），让人联想到整数量子霍尔电阻和基态一阶相变。

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Thermodynamics of a Modified Fermi-Hubbard Model

A recently introduced recurrence-relation ansatz applied to the Fermi-Hubbard model gives rise to a soluble model and here is used to calculate several thermodynamic observables. The constraint of unit density per site, density = 1, is applied and some of the results are compared to cases where the constraint is not imposed. The modified model exhibits a continuous phase transition (second order) reminiscent of the integer quantum Hall resistance and a ground state, first-order phase transition.

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arXiv - PHYS - Quantum Physics

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