Oak Ridge, Tennessee · 14 July 2025
Engineers at Oak Ridge National Laboratory (ORNL) calibrated and commissioned the Quantum Brilliance Quoll system, a first-of-its-kind on-site commercial quantum-classical hybrid computing cluster at the Oak Ridge Leadership Computing Facility (OLCF). The deployment marks the first cluster of parallelized quantum processing units (QPUs) to be integrated into a high-performance computing (HPC) environment and represents Quantum Brilliance's first deployment in the United States.
The Quoll system distinguishes itself from conventional quantum computing hardware through a fundamental architectural choice: it operates at room temperature, using synthetic diamond-based quantum processors that do not require the cryogenic cooling or vacuum-sealed environments that most other quantum computing modalities depend on.
Diamond-Based Quantum Technology
Quantum Brilliance's approach exploits nitrogen-vacancy (NV) centres in synthetic diamond — defects in the diamond crystal lattice where a nitrogen atom replaces a carbon atom adjacent to a vacant site. These NV centres host electron spins that can serve as qubits, and they exhibit remarkable stability at room temperature due to the rigid structure of the diamond lattice.
The room-temperature operation eliminates one of the most significant barriers to deploying quantum computers in conventional data centre environments. Traditional superconducting quantum computers require dilution refrigerators that cool qubits to near absolute zero (approximately 15 millikelvin), creating substantial infrastructure, energy, and maintenance requirements. The diamond-based approach sidesteps these constraints, making the system compact enough to sit alongside classical computing infrastructure.
Hybrid Quantum-Classical Computing
The primary objective of the Quoll installation at ORNL is to enable researchers to explore the mechanics of hybrid quantum-classical computing — the integration of quantum processors with classical supercomputing systems. This involves maturing several key workflow components:
- Co-scheduling: Determining when and how to dispatch computational tasks between quantum and classical processors to maximise overall system throughput
- End-to-end performance tuning: Optimising the full pipeline from problem formulation through quantum execution to classical post-processing
- Data orchestration: Managing the movement of data between quantum and classical resources with minimal latency
The three-QDK cluster architecture allows researchers to experiment with parallelised quantum execution, where multiple QPUs work simultaneously on different parts of a problem — a model that mirrors how classical HPC systems use thousands of processors in parallel.
Significance for the Quantum Computing Field
The Quoll deployment at ORNL addresses a critical gap in the quantum computing landscape. While significant research investment has focused on increasing qubit counts and improving gate fidelities, comparatively less attention has been paid to the practical challenges of integrating quantum hardware into real-world computing infrastructure. The ORNL installation provides a testbed for solving these integration challenges at a scale that is meaningful for HPC applications.
Oak Ridge National Laboratory is home to some of the world's most powerful classical supercomputers, including Frontier, which was the first exascale system in the United States. The addition of the Quoll quantum cluster creates a unique environment where researchers can develop and test hybrid algorithms that span both classical exascale computing and quantum processing.
The system's compact footprint and room-temperature operation also have implications for the scalability of quantum computing deployments. If diamond-based quantum processors can be manufactured and deployed at scale without the infrastructure overhead of cryogenic systems, the path to widespread quantum computing adoption becomes more tractable.
Recognition
Following its successful integration and operation, the Quoll system was recognised as one of TIME magazine's Best Inventions of 2025 in October 2025. The recognition cited the system's role in advancing hybrid quantum-classical computing and demonstrating a viable pathway for deploying quantum hardware in conventional computing environments.
Context: The Quantum Computing Landscape in 2025
The Quoll deployment occurred during a period of significant momentum in the quantum computing industry. In the same quarter, PsiQuantum raised $1 billion in Series E funding to build photonic quantum computers, EuroHPC-backed quantum systems went online in Poland and Czechia, and the broader industry saw record levels of venture capital investment — nearly tripling 2024 figures.
What distinguishes the Quoll installation is its focus on the integration problem rather than raw qubit count. While six qubits may seem modest compared to systems with hundreds of qubits, the value of this deployment lies in demonstrating the operational mechanics of hybrid quantum-classical computing in a real HPC environment — a prerequisite for the eventual deployment of larger, more powerful quantum systems within classical computing infrastructure.
Sources
- Quantum Computing Report, "Quantum Brilliance and ORNL Pioneer Quantum-Classical Hybrid Computing with On-Site QPU Cluster," 2025
- ORNL Oak Ridge Leadership Computing Facility, "QA: Inside Quantum Brilliance's Quantum Computer Technology," 2 September 2025
- TIME, "Best Inventions of 2025: Quantum Brilliance Quoll," October 2025
- Quantum Brilliance, press materials and company announcements, 2025
FIRAT Editorial Board
Institutional Research Desk · Foresight Institute of Research and Translation
The collective editorial and research translation board of FIRAT, synthesising peer-reviewed evidence, policy briefs, and division milestones across our seven foundational research pillars.
