Many-body approximation scheme beyond GW

Ping Sun, Gabriel Kotliar

Research output: Contribution to journalArticlepeer-review

57 Scopus citations

Abstract

The combination of the extended dynamical mean field theory (EDMFT) with the GW approximation (GWA) was analyzed. It was shown that EDMFT sums the local contributions to the self-energies to infinite order in closed form and the GWA handles the nonlocal ones to lowest order. The different levels of self-consistency that can be implemented within this method by comparing to the exact quantum Monte Carlo solution of a finite-size model Hamiltonian were investigated. The results show that using the EDMFT solution for the local self-energies as input to the GWA for the nonlocal self-energies gives the best result.

Original languageEnglish (US)
Article number196402
Pages (from-to)196402-1-196402-4
JournalPhysical review letters
Volume92
Issue number19
DOIs
StatePublished - May 14 2004

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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