Wichmann-Kroll vacuum polarization correction to lithium-like systems in a Gaussian basis set

Haisum Hayat, Harry M. Quiney

Recent developments have seen the application of finite Gaussian basis sets to the $\hat{I}\pm (Z\hat{I}\pm {)}^{n\ge 3}$ vacuum polarization. The energy shift for $s$ and $p$ electron states have bee…