Electronic density
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In quantum mechanics, and in particular in quantum chemistry, the electronic density ρ corresponding to an N-electron wavefunction Ψ(N) is the one-electron function given by
In the case Ψ(N) is a Slater determinant made of N spin orbitals :
The two-electron electronic density is given by
Those quantities are particularly important in the context of density functional theory.
The coordinates x used here are the spin-spatial coordinates.