The correlation functions of quantum systems—central objects in quantum field theories—
are defined in high-dimensional space-time domains. Their numerical treatment thus suffers …

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 …

Strongly correlated electron systems are challenging to calculate, and entanglement in such
systems is not widely analyzed. We present an approach that can be used as a …

We present the first application of quantics tensor trains (QTTs) and tensor cross
interpolation (TCI) to the solution of a full set of self-consistent equations for multivariate …

We illustrate the algorithmic advantages of the recently introduced single-boson exchange
(SBE) formulation for the one-loop functional renormalization group (fRG), by applying it to …

We extend the recently introduced single-boson exchange formulation to the computation of
the self-energy from the Schwinger-Dyson equation (SDE). In particular, we derive its …

The present paper is the second of a series of publications that aim at investigating relevant
directions to turn the nuclear energy density functional (EDF) method as an effective field …

Abstract Space-time dependence of imaginary-time propagators, vital for ab initio and many-
body calculations based on quantum field theories, has been revealed to be compressible …

We perform a fluctuation analysis of the pairing interaction in the hole-doped Hubbard
model within the dynamical cluster approximation. Our analysis reveals that spin-fluctuation …

We generalize the three two-particle Bethe-Salpeter equations to ten three-particle ladders.
These equations are exact and yield the exact three-particle vertex, if we knew the three …