Many-Body Perturbation Theory Using the Density-Functional Concept: Beyond theGWApproximation
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چکیده
منابع مشابه
Many-body perturbation theory using the density-functional concept: beyond the GW approximation.
We propose an alternative formulation of many-body perturbation theory that uses the density-functional concept. Instead of the usual four-point integral equation for the polarizability, we obtain a two-point one, which leads to excellent optical absorption and energy-loss spectra. The corresponding three-point vertex function and self-energy are then simply calculated via an integration, for a...
متن کاملMany-Body Perturbation Theory: The GW Approximation
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2005
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.94.186402