Polynomial chaos expansion of random coefficients and the solution of stochastic partial differential equations in the tensor train format

S Dolgov, BN Khoromskij, A Litvinenko… - SIAM/ASA Journal on …, 2015 - SIAM
We apply the tensor train (TT) decomposition to construct the tensor product polynomial
chaos expansion (PCE) of a random field, to solve the stochastic elliptic diffusion PDE with …

Tensor numerical methods in quantum chemistry: from Hartree–Fock to excitation energies

V Khoromskaia, BN Khoromskij - Physical Chemistry Chemical Physics, 2015 - pubs.rsc.org
We resume the recent successes of the grid-based tensor numerical methods and discuss
their prospects in real-space electronic structure calculations. These methods, based on the …

Tensor numerical methods for multidimensional PDEs: theoretical analysis and initial applications

BN Khoromskij - ESAIM: Proceedings and Surveys, 2015 - esaim-proc.org
We present a brief survey on the modern tensor numerical methods for multidimensional
stationary and time-dependent partial differential equations (PDEs). The guiding principle of …

A tensor-train accelerated solver for integral equations in complex geometries

E Corona, A Rahimian, D Zorin - Journal of Computational Physics, 2017 - Elsevier
We present a framework using the Quantized Tensor Train (qtt) decomposition to accurately
and efficiently solve volume and boundary integral equations in three dimensions. We …

Stability of low-rank tensor representations and structured multilevel preconditioning for elliptic PDEs

M Bachmayr, V Kazeev - Foundations of Computational Mathematics, 2020 - Springer
Folding grid value vectors of size 2^ L 2 L into L th-order tensors of mode size 2 * ⋯ * 2 2×⋯×
2, combined with low-rank representation in the tensor train format, has been shown to result …

Grid-based lattice summation of electrostatic potentials by assembled rank-structured tensor approximation

V Khoromskaia, BN Khoromskij - Computer Physics Communications, 2014 - Elsevier
Our recent method for low-rank tensor representation of sums of the arbitrarily positioned
electrostatic potentials discretized on a 3D Cartesian grid reduces the 3D tensor summation …

Tensor-decomposition techniques for ab initio nuclear structure calculations: From chiral nuclear potentials to ground-state energies

A Tichai, R Schutski, GE Scuseria, T Duguet - Physical Review C, 2019 - APS
Background: The computational resources needed to generate the ab initio solution of the
nuclear many-body problem for increasing mass number and/or accuracy necessitates …

Fast iterative solution of the Bethe–Salpeter eigenvalue problem using low-rank and QTT tensor approximation

P Benner, S Dolgov, V Khoromskaia… - Journal of computational …, 2017 - Elsevier
In this paper, we propose and study two approaches to approximate the solution of the
Bethe–Salpeter equation (BSE) by using structured iterative eigenvalue solvers. Both …

Efficient computation of the hartree–fock exchange in real-space with projection operators

NM Boffi, M Jain, A Natan - Journal of Chemical Theory and …, 2016 - ACS Publications
We describe an efficient projection-based real-space implementation of the nonlocal single-
determinant exchange operator. Through a matrix representation of the projected operator …

Range-separated tensor format for many-particle modeling

P Benner, V Khoromskaia, BN Khoromskij - SIAM Journal on Scientific …, 2018 - SIAM
We introduce and analyze the new range-separated (RS) canonical/Tucker tensor format
which aims for numerical modeling of the 3D long-range interaction potentials in …