Tiling with triangles: parquet and methods unified

F Krien, A Kauch, K Held - Physical Review Research, 2021 - APS
The parquet formalism and Hedin's GW γ approach are unified into a single theory of vertex
corrections, corresponding to an exact reformulation of the parquet equations in terms of …

Displaced Drude peak from -ton vertex corrections

J Krsnik, O Simard, P Werner, A Kauch, K Held - Physical Review B, 2024 - APS
Correlated electron systems often show strong bosonic fluctuations, eg, of antiferromagnetic
nature, around a large wave vector such as q=(π, π...). These fluctuations can give rise to …

Skewed non-Fermi liquids and the Seebeck effect

A Georges, J Mravlje - Physical Review Research, 2021 - APS
We consider non-Fermi liquids in which the inelastic scattering rate has an intrinsic particle-
hole asymmetry and obeys ω/T scaling. We show that, in contrast to Fermi liquids, this …

Nonequilibrium DMFT approach to time-resolved Raman spectroscopy

P Werner, M Eckstein, N Tsuji - Physical Review B, 2023 - APS
Raman spectroscopy uses light scattering to extract information on low-energy excitations of
solids. The Raman process is described by diagrams which are fourth order in the light …

Resistance saturation in semi-conducting polyacetylene molecular wires

A Valli, JM Tomczak - Journal of computational electronics, 2023 - Springer
Realizing the promises of molecular electronic devices requires an understanding of
transport on the nanoscale. Here, we consider a Su-Schrieffer-Heeger model for semi …

Prototypical many-body signatures in transport properties of semiconductors

M Pickem, E Maggio, JM Tomczak - Physical Review B, 2022 - APS
We devise a methodology for charge, heat, and entropy transport driven by carriers with
finite lifetimes. Combining numerical simulations with analytical expressions for low …

LinReTraCe: The linear response transport centre

M Pickem, E Maggio, JM Tomczak - SciPost Physics Codebases, 2023 - scipost.org
Abstract We describe the" Linear Response Transport Centre"(LinReTraCe), a package for
the simulation of transport properties of solids. LinReTraCe captures quantum (in) …

Nonequilibrium evolution of the optical conductivity of the weakly interacting Hubbard model: Drude response and -ton type vertex corrections

O Simard, M Eckstein, P Werner - Physical Review B, 2021 - APS
The optical conductivity contains information about energy absorption and the underlying
physical processes. In finite-dimensional systems, vertex corrections to the bare bubble …

[PDF][PDF] Analytical expression for -ton vertex contributions to the optical conductivity

J Krsnik, A Kauch, K Held - arXiv preprint arXiv:2409.11158, 2024 - scipost.org
Vertex corrections from the transversal particle-hole channel, so-called π-tons, are generic
in models for strongly correlated electron systems and can lead to a displaced Drude peak …

Nonequilibrium methods to treat vertex corrections in correlated electron systems

O Simard - 2023 - sonar.ch
In systems of indistinguishable particles, correlations between the quantum degrees of
freedom can give rise to collective modes where particles behave coherently together over …