Group-theoretic approach to two-electron correlations in atoms
We suggest that group-theoretic techniques may be useful for studying two-electron correlations in atoms. We show that matrix elements of the Coulomb interaction for doubly excited states of the S1 configuration can be approximated by a constant plus a pairing term. The latter gives rise to a highly correlated state similar to a Cooper pair in the electron gas. It may be identified with the state that leads to the Wannier threshold law for the escape of two electrons from a Coulomb core. © 1981 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Iachello, F., & Rau, A. (1981). Group-theoretic approach to two-electron correlations in atoms. Physical Review Letters, 47 (7), 501-504. https://doi.org/10.1103/PhysRevLett.47.501