80 citations · 315 across the 5 of their papers we have counts for
5 papers
Boson-Exchange Parquet Solver for dual fermions
Friedrich Krien, Angelo Valli, Patrick Chalupa +3
We present and implement a parquet approximation within the dual-fermion formalism based on a partial bosonization of the dual vertex function which substantially reduces the compu…
Fingerprints of the local moment formation and its Kondo screening in the generalized susceptibilities of many-electron problems
Patrick Chalupa, Thomas Schäfer, Matthias Reitner +3
We identify the precise hallmarks of the local magnetic moment formation and its Kondo screening in the frequency structure of the generalized charge susceptibility. The sharpness…
Attractive effect of a strong electronic repulsion -- the physics of vertex divergences
M. Reitner, P. Chalupa, L. Del Re +4
While the breakdown of the perturbation expansion for the many-electron problem has several formal consequences, here we unveil its physical effect: Flipping the sign of the effect…
Interplay between local response and vertex divergences in many-fermion systems with on-site attraction
D. Springer, P. Chalupa, S. Ciuchi +2
We investigate the divergences appearing in the two-particle irreducible vertex functions of many-fermion systems with attractive on-site interactions. By means of dynamical mean-f…
Divergences of the irreducible vertex functions in correlated metallic systems: Insights from the Anderson Impurity Model
P. Chalupa, P. Gunacker, T. Schäfer +2
In this work, we analyze in detail the occurrence of divergences in the irreducible vertex functions for one of the fundamental models of many-body physics: the Anderson impurity m…