A general scheme for axion electrodynamics is given, in which a surrounding medium of constant permittivity and permeability is assumed. Then, as an application, we provide simple numerical estimates for the electromagnetic current density produced by the electrically neutral time-dependent axions $a=a\left(t\right)$ in a strong magnetic field. As is known, the assumption $a=a\left(t\right)$ is common under astrophysical conditions. In the third part of the paper, we consider the implications by instead assuming an axion amplitude $a\left(z\right)$ depending on one coordinate z only. If such an axion field is contained within two large metal plates, one obtains an axion-generated splitting of the eigenmodes for the dispersion relation. These modes yield equal, though opposite, contributions to the pressure on the plates. We calculate the magnitude of the splitting effect in a simple one-dimensional model.

中文翻译：

---

轴力电动力学和轴力卡西米尔效应

给出了轴力电动力学的一般方案，其中假定介电常数和磁导率恒定的周围介质。然后，作为一种应用，我们提供了由电中性随时间变化的轴所产生的电磁电流密度的简单数值估计$\mathrm{一种}=\mathrm{一种}（Ť）$在强磁场中。众所周知，假设$\mathrm{一种}=\mathrm{一种}（Ť）$在天体条件下很常见。在本文的第三部分中，我们通过假设轴突幅度来考虑其含义。$\mathrm{一种}（ž）$仅取决于一个坐标z。如果这样的轴场包含在两个大的金属板中，则对于弥散关系，本征模将得到一个轴生的本征模分裂。这些模式对板上的压力产生相等但相反的贡献。我们在一个简单的一维模型中计算分裂效应的大小。