Computing quantum dynamics in the semiclassical regime

C Lasser, C Lubich - Acta Numerica, 2020 - cambridge.org
The semiclassically scaled time-dependent multi-particle Schrödinger equation describes,
inter alia, quantum dynamics of nuclei in a molecule. It poses the combined computational …

Computational methods for the dynamics of the nonlinear Schrödinger/Gross–Pitaevskii equations

X Antoine, W Bao, C Besse - Computer Physics Communications, 2013 - Elsevier
In this paper, we begin with the nonlinear Schrödinger/Gross–Pitaevskii equation
(NLSE/GPE) for modeling Bose–Einstein condensation (BEC) and nonlinear optics as well …

Time complexity analysis of quantum algorithms via linear representations for nonlinear ordinary and partial differential equations

S **, N Liu, Y Yu - Journal of Computational Physics, 2023 - Elsevier
We construct quantum algorithms to compute the solution and/or physical observables of
nonlinear ordinary differential equations (ODEs) and nonlinear Hamilton-Jacobi equations …

Asymptotic-preserving schemes for multiscale physical problems

S ** - Acta Numerica, 2022 - cambridge.org
We present the asymptotic transitions from microscopic to macroscopic physics, their
computational challenges and the asymptotic-preserving (AP) strategies to compute …

Numerical study of fractional nonlinear Schrödinger equations

C Klein, C Sparber… - Proceedings of the …, 2014 - royalsocietypublishing.org
Using a Fourier spectral method, we provide a detailed numerical investigation of dispersive
Schrödinger-type equations involving a fractional Laplacian in an one-dimensional case. By …

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 …

Effective approximation for the semiclassical Schrödinger equation

P Bader, A Iserles, K Kropielnicka, P Singh - Foundations of Computational …, 2014 - Springer
The computation of the semiclassical Schrödinger equation presents major challenges
because of the presence of a small parameter. Assuming periodic boundary conditions, the …