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arXiv 2201.09420hep-thcond-mat.mes-hallhep-ph
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具有轴向anomaly的Lorentz破坏理论的有效电磁作用

Effective electromagnetic actions for Lorentz violating theories exhibiting the axial anomaly

A. Gómez, A. Martín-Ruiz, L. F. Urrutia

摘要:

利用热场论方法计算了一类具有洛伦兹不变性破坏(LIV)的费米子系统中CPT奇贡献对真空极化张量产生的有效电磁作用的影响,并着重讨论了依赖于化学势的修正.所考虑的系统表现出轴向异常和它们的有效行动所描述的轴子电动力学,从而所有的LIV参数进入耦合$Θ(x)$的未修改庞特里亚金密度。初步应用于I型倾斜外尔半金属的简要介绍。

英文摘要:

The CPT odd contribution to the effective electromagnetic action deriving from the vacuum polarization tensor in a large class of fermionic systems exhibiting Lorentz invariance violation (LIV) is calculated using thermal field theory methods, focusing upon corrections depending on the chemical potential. The systems considered exhibit the axial anomaly and their effective actions are described by axion electrodynamics whereby all the LIV parameters enter in the coupling $Θ(x)$ to the unmodified Pontryagin density. A preliminary application to type-I tilted Weyl semimetals is briefly presented.

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