Slater determinant for multi-electron atoms (atomic-physics)

Atomic-physics application of L0 LU factorisation and Gaussian elimination. The antisymmetric N-electron wavefunction is a Slater determinant Ψ(1,…,N) = (1/√N!) det[φ_i(j)] of one-electron spin-orbitals. By permutation antisymmetry,…