IT services provider Fujitsu Limited (TSE: 6702) has released its quantum application development framework, the Open Quantum Application Research Package (OpenQARP), as open-source software under the Apache License 2.0. Published on GitHub (v0.1.0), the package provides over 100 modular software components—comprising 70 composable building blocks and 20 pre-built algorithms—to reduce implementation complexity across NISQ and fault-tolerant quantum computing (FTQC) application workflows, achieving up to a 70% reduction in code volume.
The library features Fujitsu-developed algorithms engineered to minimize logical circuit depth and state-preparation overhead across ground and excited state calculations (VQE, ADAPT-VQE, SSVQE, oo-pCCD/UpCCD), spectra and dynamics (QPE, DOS-QPE, Trotter, QSVT), and optimization (QAOA, PCE, Quantum Monte Carlo). Key chemistry primitives include the Unitary Pair Coupled Cluster Doubles (UpCCD) algorithm—which incorporates classical pre-computation to shorten initial state-preparation circuits—and Density of States Quantum Phase Estimation (DOS-QPE), which simplifies input-state synthesis for energy spectra calculations. In materials science benchmarking, OpenQARP’s SSVQE module demonstrated agreement with experimental optical property evaluations, while its Pauli Correlation Encoding (PCE) module accelerated portfolio optimization workflows.
| [ OpenQARP Software Architecture & Execution Environment ] | ||
|---|---|---|
| Software Component Category | Algorithmic & Technique Implementation | Execution Backend Compatibility |
| State Preparation & Chemistry | • UpCCD, ADAPT-VQE, SSVQE, VQD • Circuit Cutting & SABRE Routing | • Local Python / CPU Development Environment • NVIDIA CUDA-Q Platform via Source Build |
| Phase Estimation & Optimization | • DOS-QPE, QSVT, Trotter, qDRIFT • PCE, QAOA, Quantum Monte Carlo | • Fujitsu 40-Qubit State-Vector HPC Simulator • Planned Support for Fujitsu STAR QPU Architecture |
OpenQARP supports execution across standard local Python setups, GPU-accelerated environments via integration with the NVIDIA CUDA-Q platform, and Fujitsu’s 40-qubit state-vector quantum simulator powered by 1,024 A64FX-equipped PRIMEHPC FX700 supercomputer units. The global release follows a beta testing phase with more than 80 organizations under Fujitsu’s Quantum Simulator Challenge. OpenQARP complements Fujitsu’s broader hardware roadmap, which includes its joint 256-qubit superconducting system with RIKEN, ongoing development toward a 10,000+ qubit processor by 2030, and tin-vacancy (SnV) diamond-spin QPU prototypes.
Review the official press release via Fujitsu Newsroom here, inspect the open-source repository on GitHub here, access technical documentation via OpenQARP Documentation here, and explore research application details on Fujitsu OpenQARP Research Page here.
September 15, 2026
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