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arXiv 1808.06993cond-mat.stat-mech
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含可积杂质的哈伯德模型

A Hubbard model with integrable impurity

Yahya Öz, Andreas Klümper

摘要:

我们构造了一个含杂质位的可积哈伯德模型,该模型包含自旋和电荷自由度。导出了哈密顿量的Bethe不等式,并给出了两组计算其物理性质的方程。在这项研究中,使用了量子Bethe变换和量子转移矩阵方法。后一种方法允许通过使用一组有限的非线性积分方程的一致的治疗。在TBA和QTM这两种情况下,杂质对电子势的贡献由积分表达式给出。

英文摘要:

We construct an integrable Hubbard model with impurity site containing spin and charge degrees of freedom. The Bethe ansatz equations for the Hamiltonian are derived and two alternative sets of equations for the thermodynamical properties. For this study, the thermodynamical Bethe ansatz and the quantum transfer matrix approach are used. The latter approach allows for a consistent treatment by use of a finite set of non-linear integral equations. In both cases, TBA and QTM, the contribution of the impurity to the thermodynamical potential is given by integral expressions.

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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