Steady-state properties of multi-orbital systems using quantum Monte Carlo
A precise dynamical characterization of quantum impurity models with multiple interacting
orbitals is challenging. In quantum Monte Carlo methods, this is embodied by sign problems …
orbitals is challenging. In quantum Monte Carlo methods, this is embodied by sign problems …
Photoinduced ferromagnetic and superconducting orders in multiorbital Hubbard models
S Ray, P Werner - Physical Review B, 2024 - APS
The search for hidden orders in photoexcited lattice systems is an active research field
driven by experimental reports of light-induced or light-stabilized phases. In this study, we …
driven by experimental reports of light-induced or light-stabilized phases. In this study, we …
Solving quantum impurity models in the non-equilibrium steady state with tensor trains
M Eckstein - arxiv preprint arxiv:2410.19707, 2024 - arxiv.org
We discuss the evaluation of the integrals for intermediate-order diagrams in the self-
consistent strong-coupling expansion on the Keldysh contour using Tensor Cross …
consistent strong-coupling expansion on the Keldysh contour using Tensor Cross …
Strong coupling impurity solver based on quantics tensor cross interpolation
AJ Kim, P Werner - arxiv preprint arxiv:2411.19026, 2024 - arxiv.org
Numerical methods capable of handling nonequilibrium impurity models are essential for
the study of transport problems and the solution of the nonequilibrium dynamical mean field …
the study of transport problems and the solution of the nonequilibrium dynamical mean field …
Measuring the ultrafast screening of in photo-excited charge-transfer insulators with time-resolved X-ray absorption spectroscopy
D Golez, E Paprotzki, P Werner, M Eckstein - arxiv preprint arxiv …, 2024 - arxiv.org
Recent seminal experiments have utilized time-resolved X-ray absorption spectroscopy
(XAS) to investigate the ultrafast photo-induced renormalization of the electron interaction …
(XAS) to investigate the ultrafast photo-induced renormalization of the electron interaction …
Theory of ultrafast screening of in driven charge-transfer insulators: A time-resolved x-ray absorption study
Recent seminal experiments have utilized time-resolved x-ray absorption spectroscopy
(XAS) to investigate the ultrafast photoinduced renormalization of the electron interaction …
(XAS) to investigate the ultrafast photoinduced renormalization of the electron interaction …
Photoinduced charge, spin, and orbital order in the two-orbital extended Hubbard model
S Ray, P Werner - Physical Review B, 2024 - APS
Nonequilibrium control of electronically ordered hidden phases may lead to the
development of ultrafast switches and memory devices. In this study, we demonstrate …
development of ultrafast switches and memory devices. In this study, we demonstrate …
[HTML][HTML] Nonequilibrium steady state full counting statistics in the noncrossing approximation
Quantum transport is often characterized not just by mean observables like the particle or
energy current but by their fluctuations and higher moments, which can act as detailed …
energy current but by their fluctuations and higher moments, which can act as detailed …
Real-frequency TPSC+ DMFT investigation of the square-lattice Hubbard model
L Geng, J Yan, P Werner - arxiv preprint arxiv:2501.05346, 2025 - arxiv.org
We investigate the two-dimensional Hubbard model using a real-frequency implementation
of the TPSC+ DMFT approach. This hybrid method combines the nonlocal correlations …
of the TPSC+ DMFT approach. This hybrid method combines the nonlocal correlations …
Role of phonon coupling in driving photo-excited Mott insulators towards a transient superconducting steady state
S Ray, M Eckstein, P Werner - arxiv preprint arxiv:2412.19205, 2024 - arxiv.org
Understanding light-induced hidden orders is relevant for nonequilibrium materials control
and future ultrafast technologies. Hidden superconducting order, in particular, has been a …
and future ultrafast technologies. Hidden superconducting order, in particular, has been a …