论文标题
在有电背景和磁性背景的情况下，对修饰的麦克斯韦电动力学的考虑
Considerations on the modified Maxwell electrodynamics in the presence of an electric and magnetic background
论文作者
论文摘要
在存在外部和均匀的电场和磁场的情况下，研究了修饰的麦克斯韦电动力学（MODMAX）的性质。我们将围绕电磁背景的非线性理论扩展到传播场中的二阶，以获得介电常数和渗透率张量，分散关系，群体速度和屈光度指数作为外部磁场的功能。考虑了带有垂直背景字段的情况。讨论了双折射的现象，并明确了Modmax参数的基本作用。我们根据此参数和外部字段计算折射率的差异。最后，我们设置了一个场景，其中轴是存在，并计算耦合轴 - 模 - 模型电动力学的相互作用能，如果考虑了磁性背景场。该计算是在规格不变的框架中进行的，但依赖路径依赖的变量形式主义。我们的结果表明，相互作用的能量包含一个线性分量，导致静态探针电荷的限制，其中指出了ModMax参数，轴质量和轴突 - 光子耦合常数之间的干扰。
The properties of the modified Maxwell electrodynamics (ModMax) are investigated in presence of external and uniform electric and magnetic fields. We expand the non-linear theory around an electromagnetic background up to second order in the propagating fields to obtain the permittivity and permeability tensors, dispersion relations, group velocity and refractive indices as functions of external fields. The case with perpendicular background fields is contemplated. The phenomenon of birefringence is discussed and the fundamental role of the ModMax parameter becomes clear. We calculate the difference of the refractive indices in terms of this parameter and the external fields. Finally, we set up a scenario where the axion is present and compute the interaction energy for the coupled axion-ModMax electrodynamics if a magnetic background field is considered. This calculation is carried out in the framework of the gauge-invariant, but path-dependent variables formalism. Our results show that the interaction energy contains a linear component, leading to the confinement of static probe charges where the interference between the ModMax parameter, the axion mass and the axion-photon coupling constant is pointed out.
