QMCkl: A Kernel Library for Quantum Monte Carlo Applications
Abstract
Quantum Monte Carlo (QMC) methods deliver highly accurate electronic structure calculations but are computationally intensive. The quantum Monte Carlo kernel library (QMCkl) provides a modular, portable collection of high-performance kernels implementing the core building blocks of QMC calculations. It offers a C-compatible API, supports the TREXIO standard for input, and covers essential QMC kernels including atomic and molecular orbitals, cusp corrections, Jastrow factor, and the necessary derivatives also to perform variational and structural optimization. QMCkl separates algorithmic development from hardware-specific tuning by combining human-readable reference implementations with performance-optimized kernels that produce identical numerical results. The library enables consistent, efficient, and reproducible simulations across different QMC codes and architectures, and achieves substantial speedups in the evaluation of the energy and its derivatives. Beyond QMC, QMCkl can accelerate deterministic quantum chemistry workflows and visualization tools, promoting cross-code interoperability and simplifying high-performance scientific software development.
Cite
@article{arxiv.2512.16677,
title = {QMCkl: A Kernel Library for Quantum Monte Carlo Applications},
author = {Emiel Slootman and Vijay Gopal Chilkuri and Aurelien Delval and Max Hoffer and Tommaso Gorni and François Coppens and Joris van de Nes and Ramón L. Panadés-Barrueta and Evgeny Posenitskiy and Abdallah Ammar and Edgar Josué Landinez Borda and Kevin Camus and Oto Kohulàk and Emmanuel Giner and Pablo de Oliveira Castro and Cedric Valensi and William Jalby and Claudia Filippi and Anthony Scemama},
journal= {arXiv preprint arXiv:2512.16677},
year = {2026}
}