We study ground state properties of the Kondo lattice model with an electron–phonon interaction. The ground state is proved to be unique; in addition, the total spin of the ground state is determined according to the lattice structure. To prove the assertions, an extension of the method of spin reflection positivity is given in terms of order preserving operator inequalities.

中文翻译：

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近藤晶格系统中的电子-声子相互作用

我们研究了具有电子-声子相互作用的近藤晶格模型的基态性质。基态被证明是唯一的。另外，根据晶格结构确定基态的总自旋。为了证明这一结论，自旋反射正性方法的扩展给出了保持次序的算子不等式。