SEARCH Articles Figures Tables CEPA (coupled electron pair Coupled Electron Pair Approximation Coupled Electron Pair Approximation method Coupled Electron Pair Approximation potential energy surfaces Coupled Electron Pair and Cluster Expansions Coupled electron pair approximation CEPA) Coupled-electron pair approaches Coupled-electron pair formalism Coupled-pair many-electron theory Coupled-pair many-electron theory (CPMET Electron coupled Electron coupling Electron-hole pair coupling Electronic Coupling within Watson-Crick Pairs Electronic Couplings Between Neighboring Pairs Electronic coupling Electronic coupling contact radical pairs Electronic coupling geminate radical pairs Electronic coupling solvent-separated radical pairs Extended coupled-pair many-electron Extended coupled-pair many-electron theory Multi-reference coupled electron-pair Pair coupling