2 papers
physics.comp-ph2024
Discrete Lehmann representation of three-point functions
Dominik Kiese, Hugo U. R. Strand, Kun Chen +3
We present a generalization of the discrete Lehmann representation (DLR) to three-point correlation and vertex functions in imaginary time and Matsubara frequency. The representati…
cond-mat.str-el2024
Embedded multi-boson exchange: A step beyond quantum cluster theories
Dominik Kiese, Nils Wentzell, Igor Krivenko +3
We introduce a diagrammatic multi-scale approach to the Hubbard model based on the interaction-irreducible (multi-boson) vertex of a small cluster embedded in a self-consistent med…