Fujitsu has released its Open Quantum Application Research Package as open-source software, making it available worldwide through GitHub.
Building blocks for developers
The package provides more than 100 software components, including Fujitsu-developed algorithms that can be combined to build applications. It aims to lower the barrier for writing specialised code for quantum algorithms, which has limited wider use beyond specialist teams. OpenQARP offers reusable software building blocks instead of requiring developers to write each element from scratch.
Users can install the software on a standard PC environment that supports Python, allowing developers to test and build applications without access to specialised quantum hardware. It also works with GPU-based systems through NVIDIA CUDA-Q and runs in Fujitsu’s own quantum simulator environment based on high-performance computing infrastructure.
The simulator uses 1,024 Fujitsu Supercomputer PRIMEHPC FX700 units equipped with the company’s A64FX processor, and supports a 40-qubit state-vector quantum simulator. More than 80 organisations have already used the pre-release beta version through joint research work and the Quantum Simulator Challenge.
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Fujitsu algorithms included in the package address specific challenges in quantum chemistry. The Unitary Pair Coupled Cluster Doubles algorithm uses results from classical computing to reduce the number of quantum gate layers needed for initial state preparation. Density of States Quantum Phase Estimation is intended to reduce the burden of preparing input states for quantum phase estimation.
A regional focus on access
One example highlighted in the release shows the package can reduce the code needed for an ADAPT-VQE process from about 130 lines of Python to fewer than 40 lines. This work relates to calculating molecular electronic states, an area often cited as a possible long-term use case for quantum systems.
In Australia, Fujitsu has been expanding its quantum computing research ties. The company signed a memorandum of understanding with CSIRO and Monash University to provide Australian researchers and students with access to Fujitsu quantum computing technology and systems in Japan. It also partnered with the Australian National University on plans for a quantum research facility and an on-site quantum computer in Canberra.
These links give the latest software release a regional angle for researchers and businesses in Australia and New Zealand looking to experiment with quantum applications. The availability of these tools on standard hardware means teams in these regions can begin exploring complex problems in material development, financial optimisation, healthcare and drug discovery without waiting for access to physical quantum machines.
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Broader hardware developments
The software release fits into Fujitsu’s broader quantum computing push. The company has been working with RIKEN on superconducting quantum computing and says it has developed a 256-qubit superconducting quantum computer. It has also started development of a superconducting quantum computer with more than 10,000 qubits.
Separately, Fujitsu says it has developed a working diamond-spin quantum computing prototype using tin-vacancy centres to improve qubit stability. NVIDIA commented on the software’s use of its CUDA-Q platform, noting that providing open tools and resources to accelerate quantum application development is one of the most important ways to accelerate the journey to useful quantum computing.
Stanwyck from NVIDIA stated that Fujitsu’s use of CUDA-Q in OpenQARP (code name) shows how the right open tools, with access to GPU acceleration, are empowering developers to build and scale towards quantum utility.
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