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Information Contained in G and G
The Hartree and HartreeFock Approximations
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added analytic appear applied approximation arguments average becomes Boltzmann equation Born collision approximation boundary condition calculation Chapter classical collision complex conservation law consider contribution Coulomb defined density density of particles depends derived describe determine discussion disturbance effect energy equation of motion equilibrium evaluated exactly example expansion expectation expression external fact factor fermion field follows Fourier given gives Green's function Hartree Hartree approximation Hence imaginary independent integral interaction leads limit momentum Note notice obtain operator ordinary particles physical pole potential pressure processes propagation quantities quantum mechanical relation removal replace represents response result satisfies scattering shielded simple slowly solution sound space temperature theory thermodynamic tion transport variables varies write written zero