Large-scale simulation of quantum algorithms for computational fluid dynamics
JAXA Supercomputer System Annual Report February 2025-January 2026
Report Number: R25EFHC0321
Subject Category: Large-Scale Challenge
- Responsible Representative: Keita Kanno, Principal Researcher, QunaSys Inc.
- Contact Information: QunaSys Inc.(info@qunasys.com)
- Members: Naoyuki Fujita, Keita Kanno, Toru Kawakubo, Kouki Nakamura, Yasuo Ozu, Toru Shibamiya, Kazumasa Ueno
Abstract
We are developing and validating algorithms aimed at achieving large-scale, high-accuracy fluid simulations using quantum computing.
Reference URL
N/A
Reasons and benefits of using JAXA Supercomputer System
By leveraging supercomputers, even large-scale algorithms can be emulated for quantum computation, enabling the development of highly reliable algorithms.
Achievements of the Year
In quantum computational fluid dynamics simulation, a single time-step evolution is implemented using a technique called block encoding, and the final state is obtained by applying a method known as QSVT (Quantum Singular Value Transformation) with the block encoding as a subroutine. In this work, we demonstrate such a QSVT-based computation using block encoding for a two-dimensional linear flow, through simulations performed with the quantum computing library QURI SDK developed and provided by QunaSys.
Publications
- Oral Presentations
"Quantum Circuit Implementation for Fluid Simulation Based on the Lattice Boltzmann Method," Kazumasa Ueno, 16th Quantum Software Workshop, October 23, 2025.
"Quantum Circuit Implementation for Fluid Simulation Based on the Lattice Boltzmann Method," Hayato Higuchi, Computational Fluid Dynamics Symposium, December 17, 2025.
Usage of JSS
Computational Information
- Process Parallelization Methods: MPI
- Thread Parallelization Methods: Fujitsu MPI
- Number of Processes: 2 - 2048
- Elapsed Time per Case: 72 Hour(s)
JSS3 Resources Used
Fraction of Usage in Total Resources*1(%): 0.00
Details
Please refer to System Configuration of JSS3 for the system configuration and major specifications of JSS3.
| System Name | CPU Resources Used(Core x Hours) | Fraction of Usage*2(%) |
|---|---|---|
| TOKI-SORA | 0.00 | 0.00 |
| TOKI-ST | 0.00 | 0.00 |
| TOKI-GP | 0.00 | 0.00 |
| TOKI-XM | 0.00 | 0.00 |
| TOKI-LM | 0.00 | 0.00 |
| TOKI-TST | 0.00 | 0.00 |
| TOKI-TGP | 0.00 | 0.00 |
| TOKI-TLM | 0.00 | 0.00 |
| File System Name | Storage Assigned(GiB) | Fraction of Usage*2(%) |
|---|---|---|
| /home | 0.00 | 0.00 |
| /data and /data2 | 0.00 | 0.00 |
| /ssd | 0.00 | 0.00 |
| Archiver Name | Storage Used(TiB) | Fraction of Usage*2(%) |
|---|---|---|
| J-SPACE | 0.00 | 0.00 |
*1: Fraction of Usage in Total Resources: Weighted average of three resource types (Computing, File System, and Archiver).
*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.
ISV Software Licenses Used
| ISV Software Licenses Used(Hours) | Fraction of Usage*2(%) | |
|---|---|---|
| ISV Software Licenses(Total) | 0.00 | 0.00 |
*2: Fraction of Usage：Percentage of usage relative to each resource used in one year.
JAXA Supercomputer System Annual Report February 2025-January 2026