Abstract
We discuss the exact Coulomb hole for the ground state of the helium atom and helium-like ions. We find that the correlated wavefunction yields a smaller probability of finding the electrons at large separations than does the Hartree-Fock wavefunction, leading to the counterintuitive conclusion that correlation brings distant electrons closer together. This effect becomes less pronounced as the nuclear charge increases.
| Original language | English |
|---|---|
| Pages (from-to) | 1089-1093 |
| Number of pages | 5 |
| Journal | Molecular Physics |
| Volume | 107 |
| Issue number | 8-12 |
| DOIs | |
| Publication status | Published - Jan 2009 |