Fast impurity solver based on equations of motion and decoupling

Qingguo Feng, Yu Zhong Zhang, Harald O. Jeschke

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


In this paper a fast impurity solver is proposed for dynamical mean-field theory (DMFT) based on a decoupling of the equations of motion for the impurity Green's function. The resulting integral equations are solved efficiently with a method based on genetic algorithms. The Hubbard and periodic Anderson models are studied with this impurity solver. The method describes the Mott metal-insulator transition and works for a large range of parameters at finite temperature on the real frequency axis. This makes it useful for the exploration of real materials in the framework of local-density approximation+DMFT.

Original languageEnglish
Article number235112
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number23
Publication statusPublished - Jun 8 2009
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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