Bound-Free Correlation Potentials for Scattering Theory
Density functional theory [1,2] (DFT) models a system of N interacting electrons by an effective one-electron Hamiltonian with a local exchange-correlation potential function. There is no competitive method available for realistic calculations on condensed matter, large molecules, or molecules containing heavy atoms. For atoms or small molecules, DFT is much more efficient than alternative methods, and often gives results of useful accuracy . Many applications of this theory to bound states have used the local-density approximation (LDA), based on the interacting homogeneous electron gas, which does not provide an adequate model of an electron outside the charge distribution responsible for the interaction energy. LDA is not expected to be a correct model for the nonlocal polarization response involved in bound-free correlation and the van der Waals interaction .
KeywordsDensity Functional Theory Polarization Potential Induce Polarization Polarization Response Test Charge
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