Helium Atom, Approximate Methods

I. The Helium Atom and Variational Principle: Approximation Methods for Complex Atomic Systems

The Independent Electron Approximation to Solving the Helium Atom Schrodinger Equation

Moving Beyond the Independent Electron Model: Perturbative and Variational Methods

First Order Perturbation Theory

Higher Order Corrections

 Helium Atom: First Order Perturbation Correction to Account for Electron-Electron Repulsion

Some comments on the Many-Electron Problem: Coordinate dependence and correlation

The Hartree Model

 Electron Spin: Extension to Intrinsic Angular Momentum

Indistinguishability of Electrons and Pauli Exclusion

Variational Method for Ground State

The Hartree-Fock Self-Consistent Field Method


https://www1.udel.edu/pchem/C444/spLectures/04222008b.pdf