27 citations · 64 across the 7 of their papers we have counts for
7 papers
Compressing local vertex functions from the multipoint numerical renormalization group using quantics tensor cross interpolation
Markus Frankenbach, Marc Ritter, Mathias Pelz +3
The multipoint numerical renormalization group (mpNRG) is a powerful impurity solver that provides accurate spectral data useful for computing local, dynamic correlation functions…
Testing the parquet equations and the U(1) Ward identity for real-frequency correlation functions from the multipoint numerical renormalization group
Nepomuk Ritz, Anxiang Ge, Markus Frankenbach +3
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…
KeldyshQFT: A C++ codebase for real-frequency multiloop functional renormalization group and parquet computations of the single-impurity Anderson model
Nepomuk Ritz, Anxiang Ge, Elias Walter +3
We provide a detailed exposition of our computational framework designed for the accurate calculation of real-frequency dynamical correlation functions of the single-impurity Ander…
Analytic continuation of multipoint correlation functions
Anxiang Ge, Johannes Halbinger, Seung-Sup B. Lee +2
Conceptually, the Matsubara formalism (MF), using imaginary frequencies, and the Keldysh formalism (KF), formulated in real frequencies, give equivalent results for systems in ther…
MatsubaraFunctions.jl: An equilibrium Green's function library in the Julia programming language
Dominik Kiese, Anxiang Ge, Nepomuk Ritz +2
The Matsubara Green's function formalism stands as a powerful technique for computing the thermodynamic characteristics of interacting quantum many-particle systems at finite tempe…
Real-frequency quantum field theory applied to the single-impurity Anderson model
Anxiang Ge, Nepomuk Ritz, Elias Walter +3
A major challenge in the field of correlated electrons is the computation of dynamical correlation functions. For comparisons with experiment, one is interested in their real-frequ…
Multiloop flow equations for single-boson exchange fRG
Marcel Gievers, Elias Walter, Anxiang Ge +2
The recently introduced single-boson exchange (SBE) decomposition of the four-point vertex of interacting fermionic many-body systems is a conceptually and computationally appealin…