Quenched Pair Breaking by Interlayer Correlations as a Key to Superconductivity in
S Ryee, N Witt, TO Wehling - Physical Review Letters, 2024 - APS
The recent discovery of superconductivity in La 3 Ni 2 O 7 with T c≃ 80 K under high
pressure opens up a new route to high-T c superconductivity. This material realizes a bilayer …
pressure opens up a new route to high-T c superconductivity. This material realizes a bilayer …
Fully self-consistent finite-temperature in Gaussian Bloch orbitals for solids
We present algorithmic and implementation details for the fully self-consistent finite-
temperature GW method in Gaussian Bloch orbitals for solids. Our implementation is based …
temperature GW method in Gaussian Bloch orbitals for solids. Our implementation is based …
Nevanlinna analytical continuation
Simulations of finite temperature quantum systems provide imaginary frequency Green's
functions that correspond one to one to experimentally measurable real-frequency spectral …
functions that correspond one to one to experimentally measurable real-frequency spectral …
Comparing Self-Consistent GW and Vertex-Corrected G0W0 (G0W0Γ) Accuracy for Molecular Ionization Potentials
We test the performance of self-consistent GW and several representative implementations
of vertex-corrected G 0 W 0 (G 0 W 0Γ). These approaches are tested on benchmark data …
of vertex-corrected G 0 W 0 (G 0 W 0Γ). These approaches are tested on benchmark data …
Multiscale space-time ansatz for correlation functions of quantum systems based on quantics tensor trains
H Shinaoka, M Wallerberger, Y Murakami, K Nogaki… - Physical Review X, 2023 - APS
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 …
are defined in high-dimensional space-time domains. Their numerical treatment thus suffers …
Analytical continuation of matrix-valued functions: Carathéodory formalism
Finite-temperature quantum field theories are formulated in terms of Green's functions and
self-energies on the Matsubara axis. In multiorbital systems, these quantities are related to …
self-energies on the Matsubara axis. In multiorbital systems, these quantities are related to …
Robust analytic continuation of Green's functions via projection, pole estimation, and semidefinite relaxation
Green's functions of fermions are described by matrix-valued Herglotz-Nevanlinna functions.
Since analytic continuation is fundamentally an ill-posed problem, the causal space …
Since analytic continuation is fundamentally an ill-posed problem, the causal space …
Two‐particle self‐consistent method for the multi‐orbital Hubbard model
K Zantout, S Backes, R Valentí - Annalen der Physik, 2021 - Wiley Online Library
One of the most challenging problems in solid state systems is the microscopic analysis of
electronic correlations. A paramount minimal model that encodes correlation effects is the …
electronic correlations. A paramount minimal model that encodes correlation effects is the …
No superconductivity in PbCu(PO)O found in orbital and spin fluctuation exchange calculations
N Witt, L Si, JM Tomczak, K Held, TO Wehling - SciPost Physics, 2023 - scipost.org
Finding a material that turns superconducting under ambient conditions has been the goal of
over a century of research, and recently Pb $ _ {10-x} $ Cu $ _x $(PO $ _4 $) $ _6 $ O aka …
over a century of research, and recently Pb $ _ {10-x} $ Cu $ _x $(PO $ _4 $) $ _6 $ O aka …
Discrete Lehmann representation of imaginary time Green's functions
J Kaye, K Chen, O Parcollet - Physical Review B, 2022 - APS
We present an efficient basis for imaginary time Green's functions based on a low-rank
decomposition of the spectral Lehmann representation. The basis functions are simply a set …
decomposition of the spectral Lehmann representation. The basis functions are simply a set …