Propagators for the time-dependent Kohn–Sham equations: Multistep, Runge–Kutta, exponential Runge–Kutta, and commutator free Magnus methods

A Gomez Pueyo, MAL Marques, A Rubio… - Journal of chemical …, 2018 - ACS Publications
We examine various integration schemes for the time-dependent Kohn–Sham equations.
Contrary to the time-dependent Schrödinger's equation, this set of equations is nonlinear …

All-electron real-time and imaginary-time time-dependent density functional theory within a numeric atom-centered basis function framework

J Hekele, Y Yao, Y Kanai, V Blum… - The Journal of Chemical …, 2021 - pubs.aip.org
Real-time time-dependent density functional theory (RT-TDDFT) is an attractive tool to
model quantum dynamics by real-time propagation without the linear response …

A μ-mode integrator for solving evolution equations in Kronecker form

M Caliari, F Cassini, L Einkemmer, A Ostermann… - Journal of …, 2022 - Elsevier
In this paper, we propose a μ-mode integrator for computing the solution of stiff evolution
equations. The integrator is based on a d-dimensional splitting approach and uses exact …

Robust quantum optimal control with trajectory optimization

T Propson, BE Jackson, J Koch, Z Manchester… - Physical Review …, 2022 - APS
The ability to engineer high-fidelity gates on quantum processors in the presence of
systematic errors remains the primary barrier to achieving quantum advantage. Quantum …

Fast, high precision dynamics in quantum optimal control theory

M Dalgaard, F Motzoi - Journal of Physics B: Atomic, Molecular …, 2022 - iopscience.iop.org
Quantum optimal control theory is becoming increasingly crucial as quantum devices
become more precise, but the need to quickly optimize these systems classically remains a …

Exponential integrators for resistive magnetohydrodynamics: Matrix-free Leja interpolation and efficient adaptive time stepping

PJ Deka, L Einkemmer - The Astrophysical Journal Supplement …, 2022 - iopscience.iop.org
We propose a novel algorithm for the temporal integration of the resistive
magnetohydrodynamics (MHD) equations. The approach is based on exponential …

Challenges in computing matrix functions

M Fasi, S Gaudreault, K Lund, M Schweitzer - arXiv preprint arXiv …, 2024 - arxiv.org
This manuscript summarizes the outcome of the focus groups at" The f (A) bulous workshop
on matrix functions and exponential integrators", held at the Max Planck Institute for …

[HTML][HTML] An accurate and time-parallel rational exponential integrator for hyperbolic and oscillatory PDEs

M Caliari, L Einkemmer, A Moriggl… - Journal of Computational …, 2021 - Elsevier
Rational exponential integrators (REXI) are a class of numerical methods that are well suited
for the time integration of linear partial differential equations with imaginary eigenvalues …

Modelling ground‐penetrating radar wave propagation using graphics processor unit parallel implementation of the symplectic Euler method

H Fang, J Lei, J Zhang, J An, F Wang - Near Surface Geophysics, 2019 - earthdoc.org
Inversion of ground‐penetrating radar signals requires accurate and efficient forward
modelling. The symplectic Euler method promises good results when simulating ground …

Exponential propagators for the Schrödinger equation with a time-dependent potential

P Bader, S Blanes, N Kopylov - The Journal of Chemical Physics, 2018 - pubs.aip.org
We consider the numerical integration of the Schrödinger equation with a time-dependent
Hamiltonian given as the sum of the kinetic energy and a time-dependent potential …