论文标题
两层虚拟虚拟光线散射校正到边界 - 电子$ g $ factor
Two-loop virtual light-by-light scattering corrections to the bound-electron $g$ factor
论文作者
论文摘要
计算了一组关键的两回合QED校正对$ g $ $ g $系数的氢化离子的校正，而无需在核结合场中膨胀。这些校正是由于量子真空对外部磁场的极化，该量子是由结合场着装的。比较了自我能量 - 磁环图获得的结果，与当前的最新结果进行了比较，该结果是通过在结合强度参数$zα$的扰动膨胀中得出的，$ z $ $ z $ themic nimber and $α$ $α$ the fine-ltructure structure常数。在$ z \ rightarrow0 $限制中找到协议。但是，即使对于非常轻的离子，扰动结果也无法将相应校正的幅度近似于$ g $因子。发现这项工作中考虑的所有图表的$ g $因子的总校正与即将进行高电荷离子的基本物理学的实验测试非常相关。
A critical set of two-loop QED corrections to the $g$ factor of hydrogenlike ions is calculated without expansion in the nuclear binding field. These corrections are due to the polarization of the external magnetic field by the quantum vacuum, which is dressed by the binding field. The result obtained for the self-energy--magnetic-loop diagrams is compared with the current state-of-the-art result, derived through a perturbative expansion in the binding strength parameter $Zα$, with $Z$ the atomic number and $α$ the fine-structure constant. Agreement is found in the $Z\rightarrow0$ limit. However, even for very light ions, the perturbative result fails to approximate the magnitude of the corresponding correction to the $g$ factor. The total correction to the $g$ factor coming from all diagrams considered in this work is found to be highly relevant for upcoming experimental tests of fundamental physics with highly charged ions.
