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Vandelli, Matteo; Kaufmann, Josef; El-Nabulsi, Mohammed; Harkov, Viktor; Lichtenstein, Alexander; Stepanov, Evgeny
SciPost physics, 08/2022, Letnik: 13, Številka: 2Journal Article
We present the multi-band dual triply irreducible local expansion (D-TRILEX) approach to interacting electronic systems and discuss its numerical implementation. This method is designed for a self-consistent description of multi-orbital systems that can also have several atoms in the unit cell. The current implementation of the D-TRILEX approach is able to account for the frequency- and channel-dependent long-ranged electronic interactions. We show that our method is accurate when applied to small multi-band systems such as the Hubbard-Kanamori dimer. Calculations for the extended Hubbard, the two-orbital Hubbard-Kanamori, and the bilayer Hubbard models are also discussed.
