Data for: Testing the parquet equations and the U(1) Ward identity for real-frequency correlation functions from the multipoint numerical renormalization group
Ritz, Nepomuk
;
Ge, Anxiang
;
Frankenbach, Markus Kilian
;
Pelz, Mathias
;
von Delft, Jan
;
Kugler, Fabian B.
2025
Dataset
Recently, it has become possible to compute real-frequency four-point correlation functions of quantum impurity models using a multipoint extension of the numerical renormalization group (MuNRG). In this work, we perform several numerical consistency checks of the output of MuNRG by...
dynamical correlation functions
four-point vertex
single-impurity Anderson model
Keldysh formalism
parquet equations
Ward identities
multipoint numerical renormalization group
quantum field theory
correlated electrons
many-body physics
Uploaded on June 17, 2025