In a one-flavor NJL model with a finite temperature, chemical potential, and external magnetic field, the self-energy of the quark propagator contains more condensates besides the vacuum condensate. We use Fierz identity to identify the self-energy and propose a self-consistent analysis to simplify it. It turns out that these condensates are related to the chiral separation effect and spin magnetic moment.

中文翻译：

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具有外部磁场的 NJL 模型中的夸克自能和凝聚

在具有有限温度、化学势和外部磁场的单一风味 NJL 模型中，夸克传播子的自能除了真空凝聚体之外还包含更多的凝聚体。我们使用 Fierz 恒等式来识别自能，并提出一个自洽分析来简化它。事实证明，这些凝聚物与手性分离效应和自旋磁矩有关。