The critical role of negative-energy states in the Landé $g$-factor of lithium-like ions

Chang-Xian Song, Yong-Bo Tang

We report relativistic many-body calculations of the interelectronic-interaction correction to the Landé $g$-factor of the $2s_{1/2}$, $2p_{1/2}$, $2p_{3/2}$, and $3s_{1/2}$ state…