Diagrammatic routes to nonlocal correlations beyond dynamical mean field theory
Strong electronic correlations pose one of the biggest challenges to solid state theory.
Recently developed methods that address this problem by starting with the local, eminently …
Recently developed methods that address this problem by starting with the local, eminently …
Merging GW with DMFT and non-local correlations beyond
We review recent developments in electronic structure calculations that go beyond state-of-
the-art methods such as density functional theory (DFT) and dynamical mean field theory …
the-art methods such as density functional theory (DFT) and dynamical mean field theory …
w2dynamics: Local one-and two-particle quantities from dynamical mean field theory
We describe the hybridization-expansion continuous-time quantum Monte Carlo code
package “w2dynamics”, developed in Wien and Würzburg. We discuss the main features of …
package “w2dynamics”, developed in Wien and Würzburg. We discuss the main features of …
Tensor train continuous time solver for quantum impurity models
The simulation of strongly correlated quantum impurity models is a significant challenge in
modern condensed matter physics that has multiple important applications. Thus far, the …
modern condensed matter physics that has multiple important applications. Thus far, the …
Highly nonperturbative nature of the Mott metal-insulator transition: Two-particle vertex divergences in the coexistence region
M Pelz, S Adler, M Reitner, A Toschi - Physical Review B, 2023 - APS
We thoroughly analyze the divergences of the irreducible vertex functions occurring in the
charge channel of the half-filled Hubbard model in close proximity to the Mott metal-insulator …
charge channel of the half-filled Hubbard model in close proximity to the Mott metal-insulator …
Ab initio dynamical vertex approximation
Diagrammatic extensions of dynamical mean-field theory (DMFT) such as the dynamical
vertex approximation (D Γ A) allow us to include nonlocal correlations beyond DMFT on all …
vertex approximation (D Γ A) allow us to include nonlocal correlations beyond DMFT on all …
Self-consistent ladder dynamical vertex approximation
We present and implement a self-consistent D Γ A approach for multiorbital models and ab
initio materials calculations. It is applied to the one-band Hubbard model at various …
initio materials calculations. It is applied to the one-band Hubbard model at various …
Decomposing imaginary-time Feynman diagrams using separable basis functions: Anderson impurity model strong-coupling expansion
We present a deterministic algorithm for the efficient evaluation of imaginary-time diagrams
based on the recently introduced discrete Lehmann representation (DLR) of imaginary-time …
based on the recently introduced discrete Lehmann representation (DLR) of imaginary-time …
Computing local multipoint correlators using the numerical renormalization group
Local three-and four-point correlators yield important insight into strongly correlated systems
and have many applications. However, the nonperturbative, accurate computation of …
and have many applications. However, the nonperturbative, accurate computation of …
Electronic orders in multiorbital Hubbard models with lifted orbital degeneracy
We study the symmetry-broken phases in two-and three-orbital Hubbard models with lifted
orbital degeneracy using dynamical mean-field theory. On the technical level, we explain …
orbital degeneracy using dynamical mean-field theory. On the technical level, we explain …