Numerical homogenization beyond scale separation

R Altmann, P Henning, D Peterseim - Acta Numerica, 2021 - cambridge.org
Numerical homogenization is a methodology for the computational solution of multiscale
partial differential equations. It aims at reducing complex large-scale problems to simplified …

[BOEK][B] Numerical homogenization by localized orthogonal decomposition

A Målqvist, D Peterseim - 2020 - SIAM
The objective of this book is to introduce the reader to the Localized Orthogonal
Decomposition (LOD) method for solving partial differential equations with multiscale data …

Sobolev gradient flow for the Gross--Pitaevskii eigenvalue problem: Global convergence and computational efficiency

P Henning, D Peterseim - SIAM Journal on Numerical Analysis, 2020 - SIAM
We propose a new normalized Sobolev gradient flow for the Gross--Pitaevskii eigenvalue
problem based on an energy inner product that depends on time through the density of the …

Riemannian Newton methods for energy minimization problems of Kohn–Sham type

R Altmann, D Peterseim, T Stykel - Journal of Scientific Computing, 2024 - Springer
This paper is devoted to the numerical solution of constrained energy minimization problems
arising in computational physics and chemistry such as the Gross–Pitaevskii and Kohn …

The J-method for the Gross–Pitaevskii eigenvalue problem

R Altmann, P Henning, D Peterseim - Numerische Mathematik, 2021 - Springer
This paper studies the J-method of [E. Jarlebring, S. Kvaal, W. Michiels. SIAM J. Sci. Comput.
36-4: A1978-A2001, 2014] for nonlinear eigenvector problems in a general Hilbert space …

Quantum states in disordered media. I. Low-pass filter approach

F Gebhard, AV Nenashev, K Meerholz, SD Baranovskii - Physical Review B, 2023 - APS
The current burst in research activities on disordered semiconductors calls for the
development of appropriate theoretical tools that reveal the features of electron states in …

Error estimate of a quasi-Monte Carlo time-splitting pseudospectral method for nonlinear Schrödinger equation with random potentials

Z Wu, Z Zhang, X Zhao - SIAM/ASA Journal on Uncertainty Quantification, 2024 - SIAM
In this paper, we consider the numerical solution of a nonlinear Schrödinger equation with
spatial random potential. The randomly shifted quasi-Monte Carlo (QMC) lattice rule …

Localized computation of eigenstates of random Schrödinger operators

R Altmann, D Peterseim - SIAM Journal on Scientific Computing, 2019 - SIAM
This paper concerns the numerical approximation of low-energy eigenstates of the linear
random Schrödinger operator. Under oscillatory high-amplitude potentials with a sufficient …

Fast eigenpairs computation with operator adapted wavelets and hierarchical subspace correction

H **e, L Zhang, H Owhadi - SIAM Journal on Numerical Analysis, 2019 - SIAM
We present a method for the fast computation of the eigenpairs of a bijective positive
symmetric linear operator L. The method is based on a combination of operator adapted …