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arXiv 0905.1733hep-ph
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无质量QED中动力学产生的反常磁矩

Dynamically Generated Anomalous Magnetic Moment in Massless QED

Efrain J. Ferrer, Vivian de la Incera

摘要:

本文研究了无质量费米子在外加磁场中反常磁矩的非微扰产生。在磁场中的无质量QED的背景下,我们证明了手征对称性破缺的磁催化现象,这已在文献中与动力学质量产生,也是负责的动力学反常磁矩的产生。因此,朗道能级上电子的简并能量高于零时会出现塞曼分裂。我们明确地报告了第一朗道能级的分裂,并找到了非微扰的Lande $\textit{g}$因子和玻尔磁子。我们预期,动态产生的反常磁矩将是磁催化理论的普遍特征。我们的发现对于石墨烯等凝聚平面系统以及形成致密恒星核心的高磁化密度系统都很重要。

英文摘要:

In this paper we investigate the non-perturbative generation of an anomalous magnetic moment for massless fermions in the presence of an external magnetic field. In the context of massless QED in a magnetic field, we prove that the phenomenon of magnetic catalysis of chiral symmetry breaking, which has been associated in the literature with dynamical mass generation, is also responsible for the generation of a dynamical anomalous magnetic moment. As a consequence, the degenerate energy of electrons in Landau levels higher than zero exhibits Zeeman splitting. We explicitly report the splitting for the first Landau level and find the non-perturbative Lande $\textit{g}$-factor and Bohr magneton. We anticipate that a dynamically generated anomalous magnetic moment will be a universal feature of theories with magnetic catalysis. Our findings can be important for condensed planar systems as graphene, as well as for highly magnetized dense systems as those forming the core of compact stars.

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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