flerlektronsystemer
Flerlektronsystemer refers to atomic or molecular systems containing more than one electron. In contrast to one-electron systems like hydrogen, the interactions between multiple electrons in flerlektronsystemer introduce significant complexity to their quantum mechanical description. The presence of electron-electron repulsion, governed by Coulomb's law, means that the motion of each electron is not independent but is correlated with the motion of all other electrons.
Accurately solving the Schrödinger equation for flerlektronsystemer is generally not possible analytically due to this electron-electron
More sophisticated methods, such as Configuration Interaction (CI), Coupled Cluster (CC), and Density Functional Theory (DFT),