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Many-body GW calculations of ground-state properties: Quasi-2D electron systems and van der Waals forces

By P Garcia-Gonzalez and R W Godby


We present GW many-body results for ground-state properties of two simple but very distinct families of inhomogeneous systems in which traditional implementations of density-functional theory (DFT) fail drastically. The GW approach gives notably better results than the well-known random-phase approximation, at a similar computational cost. These results establish GW as a superior alternative to standard DFT schemes without the expensive numerical effort required by quantum Monte Carlo simulations

Year: 2002
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