A Practical Open-Source Software Stack for a Cloud-Based Quantum Computing System

• URL: http://arxiv.org/abs/2507.23165v1
• Date: Thu, 31 Jul 2025 00:23:31 GMT
• Title: A Practical Open-Source Software Stack for a Cloud-Based Quantum Computing System
• Authors: Norihiro Kakuko, Shun Gokita, Naoyuki Masumoto, Keita Matsumoto, Kosuke Miyaji, Takafumi Miyanaga, Toshio Mori, Haruki Nakayama, Keita Sasada, Yasuhito Takamiya, Satoyuki Tsukano, Ryo Uchida, Masaomi Yamaguchi,
• Abstract summary: In Japan, several domestic superconducting quantum computing systems, including our own, began operation in 2023.<n>The design of quantum computing systems, especially in the most critical areas near quantum computers, remains largely undisclosed.<n>We propose Open Quantum Toolchain for OPerators and USers (OQTOPUS), a full-stack quantum computing system developed from research with real quantum computers.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Since the late 2010s, quantum computers have become commercially available, and the number of services that users can run remotely via cloud servers is increasing. In Japan, several domestic superconducting quantum computing systems, including our own, began operation in 2023. However, the design of quantum computing systems, especially in the most critical areas near quantum computers, remains largely undisclosed, creating a significant barrier to entry into the quantum computing field. If this situation continues, progress toward standardization, which is essential for guiding quantum computer development, will stall, and it will be difficult to develop a practical quantum computing system that can perform calculations on a supercomputer scale. To address this issue, we propose Open Quantum Toolchain for OPerators and USers (OQTOPUS), a full-stack quantum computing system developed from research with real quantum computers. OQTOPUS is one of the world's largest open-source software projects, covering operational software from cloud-based execution environment construction to system operation. Furthermore, to perform quantum computing effectively and efficiently, it implements key features, such as transpilers, multiprogramming, and error mitigation, in an area as close as possible to a quantum computer, an area that system vendors rarely disclose. Finally, this study presents experimental results of applying OQTOPUS to a real quantum computer. OQTOPUS is publicly available on GitHub and will notably lower the barrier to entry into the quantum computing field, contributing to the formation of a quantum computing developer community through open discussion.

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