论文标题
轴心背景下的光线弯曲
Bending of light in axion backgrounds
论文作者
论文摘要
在这项工作中，我们通过计算轴心电动力学的完整溶液来检查光的折射。我们还允许使用其他等离子体成分。然后，我们专门研究与背景尺度相比小的波长，以确定是否可以通过几何光学元件描述折射。我们还允许使用其他等离子体成分。在缺乏等离子体的情况下，对于相对于光轴的小发射角度，轴支电动力学和几何光学器件非常吻合，折射发生在$ \ MATHCAL {O}（g_ {aγγ}^2）$。但是，对于远离光轴的射线，与几何光学元件的一致性分解，并且主要的折射需要进行全波光处理，该处理发生在$ \ Mathcal {O}（g_ {aγγ}）$下。在存在足够大的血浆质量的情况下，光的波形性质被抑制，几何光学元件与所有射线的完整理论都吻合。因此，我们的结果表明，需要对轴突背景进行透镜和射线追踪进行更全面的研究，包括对新颖的$ \ Mathcal {O}（g_ {aγγ}）$波光贡献对折射的贡献。
In this work we examine refraction of light by computing full solutions to axion electrodynamics. We also allow for the possibility of an additional plasma component. We then specialise to wavelengths which are small compared to background scales to determine if refraction can be described by geometric optics. We also allow for the possibility of an additional plasma component. In the absence of plasma, for small incidence angles relative to the optical axis, axion electrodynamics and geometric optics are in good agreement, with refraction occurring at $\mathcal{O}(g_{a γγ}^2)$. However, for rays which lie far from the optical axis, the agreement with geometric optics breaks down and the dominant refraction requires a full wave-optical treatment, occurring at $\mathcal{O}(g_{a γγ})$. In the presence of sufficiently large plasma masses, the wave-like nature of light becomes suppressed and geometric optics is in good agreement with the full theory for all rays. Our results therefore suggest the necessity of a more comprehensive study of lensing and ray-tracing in axion backgrounds, including a full account of the novel $\mathcal{O}(g_{a γγ})$ wave-optical contribution to refraction.
