论文标题
氢样原子中的环形光学转变
Toroidal optical transitions in hydrogen-like atoms
论文作者
论文摘要
人们普遍认为，可以通过电气和磁多物的相互作用来充分描述原子和分子的电磁光谱。然而，最近很清楚，光与物质之间的相互作用也涉及环形多物 - 在电磁材料中已经观察到环形吸收系线。在这里，我们表明，如果除了经典的r {\ times} r {\ times} r {\ times} t roloidal偶极密度的新型光谱镜检查，那么在很大程度上被忽视的环形双极相互作用将变得可行。考虑到。我们表明，在奇偶校验和时间反转对称性下，环形转变是奇怪的。因此，可以观察到它们与电气多极和磁偶极转变。
It is commonly believed that electromagnetic spectra of atoms and molecules can be fully described by interactions of electric and magnetic multipoles. However, it has recently become clear that interactions between light and matter also involve toroidal multipoles - toroidal absorption lines have been observed in electromagnetic metamaterials. Here we show that a new type of spectroscopy of the hitherto largely neglected toroidal dipolar interaction becomes feasible if, apart from the classical r{\times}r{\times}p toroidal dipole density term responsible for the toroidal transitions in metamaterials, the spin-dependent r{\times}σ term (that only occurs in relativistic quantum mechanics) is taken into account. We show that toroidal transitions are odd under parity and time-reversal symmetries; they can therefore be observed and distinguished from electric multipole and magnetic dipole transitions.
