Magnetic field effect in the fine-structure constant and electron dynamical mass
Magnetic field effect in the fine-structure constant and electron dynamical mass
复制标题
DOI：
10.1103/physrevd.100.096006
复制
发表时间：
2019-10
影响因子：
5
通讯作者：
E. Ferrer;A. Sánchez
中科院分区：
文献类型：
--
作者：
E. Ferrer;A. Sánchez
研究了外加恒定磁场和均匀磁场对有质量和无质量QED精细结构常数的影响。在大质量QED中，强磁场移去了所谓的朗道极，精细结构常数变得各向异性，沿沿着和横向于磁场方向具有不同的值。与文献中的其他结果相反，我们发现各向异性精细结构常数总是随场而减小。我们还研究了耦合常数随磁场变化对电子质量的影响。我们发现，在有质量和无质量QED的情况下，电子动力学质量总是随着磁场的增加而减小，这可以解释为一种逆磁催化效应。
We investigate the effect of an applied constant and uniform magnetic field in the fine-structure constant of massive and massless QED. In massive QED, it is shown that a strong magnetic field removes the so called Landau pole and that the fine-structure constant becomes anisotropic having different values along and transverse to the field direction. Contrary to other results in the literature, we find that the anisotropic fine-structure constant always decreases with the field. We also study the effect of the running of the coupling constant with the magnetic field on the electron mass. We find that in both cases of massive and massless QED, the electron dynamical mass always decreases with the magnetic field, what can be interpreted as an inverse magnetic catalysis effect.