Parallel Identification of Unique Sequences in Nuclear Structure Calculations

0573038 - ÚJF 2024 RIV DE eng C - Conference Paper (international conference)
Langr, D. - Dytrych, Tomáš
Parallel Identification of Unique Sequences in Nuclear Structure Calculations.
Lecture Notes in Computer Science. Vol. 13827. Cham: Springer, 2023, s. 357-369. ISBN 978-3-031-30444-6.
[International Conference on Parallel Processing and Applied Mathematics /14./. Gdansk (PL), 11.09.2022-14.09.2022]
R&D Projects: GA ČR(CZ) GA22-14497S
Research Infrastructure: e-INFRA CZ II - 90254
Institutional support: RVO:61389005
Keywords : unique sequences * nuclear structure
OECD category: Nuclear physics

Reducing the set of sequences into the set of sequences that are unique can save a lot of memory space in computer programs. We study this problem on the symmetry-adapted no-core shell model (SA-NCSM) nuclear structure calculations, where duplicated sequences of different kinds naturally emerge in the data of the basis of the Hilbert space physically relevant to a given nucleus. For a fast solution of this problem on multicore architectures, we propose and present a multithreaded algorithm suitable for high performance computing (HPC) environments. Furthermore, we provide an experimental evaluation of this algorithm and show that, in practice, it can significantly reduce the time required to identify unique sequences in a real-world application.
Permanent Link: https://hdl.handle.net/11104/0343566