Published October 10, 2022 | Version v1
Poster Open

Libraries developed in the TREX Center of Excellence - poster presented at the CECAM Workshop 2022

  • 1. CNRS
  • 2. Université de Versailles-Saint-Quentin-en-Yvelines


The TREX European Center of Excellence focuses on high-accuracy quantum mechanical methods, essential in many different fields of application such as new material design or photochemistry. Among these methods, Quantum Monte Carlo (QMC) approaches are particularly well adapted to exascale architectures. Our ambition is to help the community take advantage of exascale machines through the use of our HPC software.

We will review the presentation progress along the three following axes:

  • TREXIO: A common I/O library and file format for easily exchanging data between applications, facilitating high-throughput computing workflows,
  • QMCkl: A library of computational kernels specific to QMC applications written together by QMC and HPC experts, taking advantage of both CPUs and GPUs,
  • An integrated workflow including performance analysis (MAQAO) and numerical accuracy measurements (Verificarlo) is to be used for the development of QMC kernels and more generally for improving the applications. In particular, we plan to identify the best performance usage of QMCkl and also to adjust the performance with numerical precision requirements.

Visit the TREX website and learn more about the TREX Libraries at


Libraries developed in the TREX CoE at CECAM Workshop 2022.pdf

Files (4.1 MB)

Additional details


TREX – Targeting Real chemical accuracy at the EXascale 952165
European Commission