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摘要翻译：
本文研究了配位数为z的Bethe晶格上费米粒子系统在有限温度下的相图。这是扩展的哈伯德模型在原子极限中的物理实现。利用运动方程法，对模型进行了精确求解。对于一个吸引的位间势，我们发现，在半填充时，有一个向破碎的粒子-空穴对称态的相变。临界温度作为相关参数的函数，具有重入行为，正如在Bethe晶格上的等效自旋为1的Ising模型中已经观察到的那样。
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英文标题：
《Exact solution of the extended Hubbard model in the atomic limit on the
Bethe Lattice》
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作者：
F. Mancini, F. P. Mancini and A. Naddeo
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最新提交年份：
2007
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分类信息：
一级分类：Physics 物理学
二级分类：Strongly Correlated Electrons 强关联电子
分类描述：Quantum magnetism, non-Fermi liquids, spin liquids, quantum criticality, charge density waves, metal-insulator transitions
量子磁学，非费米液体，自旋液体，量子临界性，电荷密度波，金属-绝缘体跃迁
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一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
We study the phase diagram at finite temperature of a system of Fermi particles on the sites of the Bethe lattice with coordination number z and interacting through onsite U and nearest-neighbor V interactions. This is a physical realization of the extended Hubbard model in the atomic limit. By using the equations of motion method, we exactly solve the model. For an attractive intersite potential, we find, at half filling, a phase transition towards a broken particle-hole symmetry state. The critical temperature, as a function of the relevant parameters, has a re-entrant behavior as already observed in the equivalent spin-1 Ising model on the Bethe lattice.
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PDF链接：
https://arxiv.org/pdf/711.0318
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