Brillouin-Wigner perturbation theory and
✍
C. Laughlin; M. R. Woodward; A. T. Amos
📂
Article
📅
1974
🏛
John Wiley and Sons
🌐
English
⚖ 340 KB
## Abstract A Brillouin‐Wigner perturbation expansion is derived for the generalized eigenvalue equation (__F__~0~ + __F__~1~)Ψ = μ__A__Ψ. The theory is applied through second order to calculate the ground‐state energies of the helium atom and the hydrogen molecular ion. The results are compared wi