Dyson Orbitals, Quasi-Particle effects and Compton scattering

Details Dyson Orbitals, Quasi-Particle effects and Compton scattering Dyson Orbitals, Quasi-Particle effects and Compton scattering

2004-05-08

arxiv.org/abs/cond-mat/0405167v1

J. Phys. Chem. Solids 65, 2031 (2004)

Physics

Condensed Matter

Materials Science

1 figure, 4 pages

Scientific paper

10.1016/j.jpcs.2004.08.016

Dyson orbitals play an important role in understanding quasi-particle effects in the correlated ground state of a many-particle system and are relevant for describing the Compton scattering cross section beyond the frameworks of the impulse approximation (IA) and the independent particle model (IPM). Here we discuss corrections to the Kohn-Sham energies due to quasi-particle effects in terms of Dyson orbitals and obtain a relatively simple local form of the exchange-correlation energy. Illustrative examples are presented to show the usefulness of our scheme.

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