“Know how to solve every problem that has been solved.”“What I cannot create, I do not understand.”— Richard Feynman
QC II · Project 1 — FCI for H₂: the exact curve
Quantum Chemistry
The payoff figure of the whole series: RHF's curve failed (QC I project 8), UHF fixed it by
cheating on spin (project 10) — now get it right. Two determinants, one 2×2 matrix, and the
exact answer in this basis, all the way to dissociation.