Q-CTRL Quantum Control Software Tunes the QUB on Open Quantum
Q-CTRL's Boulder Opal software provides autonomous calibration, error suppression, and performance management inside the Quantum Utility Block.
About Q-CTRL
Q-CTRL is based in Sydney, Australia and has US operations serving the North American market. The company's mission is to make quantum computers commercially useful by eliminating the need for constant human intervention.
Q-CTRL's Opal product suite spans the full stack of quantum computing operations. Boulder Opal is the professional platform for hardware teams, Fire Opal is the algorithm-execution layer, and Black Opal serves the education market with quantum computing courses.
Q-CTRL in the Quantum Utility Block
The Quantum Utility Block (QUB) is a pre-validated, on-premises quantum computer jointly engineered by Quantware, Qblox, and Q-CTRL. The stack consists of three interoperable layers: a QuantWare superconducting QPU, Qblox control electronics, and Q-CTRL's Boulder Opal autonomous software. Together they form an upgradable, operationally ready system, brought online as a cloud service by Open Quantum.
Running a quantum computer at useful fidelity requires constant tuning: gates drift, noise accumulates, and calibration parameters shift with temperature and time. Q-CTRL's role inside the QUB is to automate tuning and make the system self-maintaining. Boulder Opal continuously monitors device performance, detects drift in gate parameters, and applies corrections. It handles error suppression at the pulse level, characterizes the device over time, and exposes a clean interface for algorithm execution. This allows the QUB system to reach and hold high fidelity without a team of scientists manually tuning gates.
Open Quantum integrates directly with Boulder Opal's calibration data. On Q-CTRL-powered systems you can view the backend's current calibration data before you run, or download the historic calibration snapshots attached to prior executions, from the portal or through the SDK. You see how the machine was performing when your job ran, not just how it performs today.
The QUB Stack
Cloud Layer
Open Quantum QaaS, unified API and job scheduling
Software Layer
Q-CTRL Boulder Opal software
Control Layer
Qblox Cluster electronics + Q1 pulse processor
QPU Layer
QuantWare superconducting QPU
Why It Matters on Open Quantum
Real Superconducting Hardware
Run circuits on a genuine superconducting QPU, not a simulator.
Pre-Validated Stack
The QUB arrives as a jointly validated system from QuantWare, Qblox, and Q-CTRL. Open Quantum adds the cloud layer without disrupting the validated hardware-software stack.
Cloud Access in Days
Open Quantum is the drop-in QaaS layer for a QUB system. A QUB deployment goes from on-premises hardware to cloud-accessible endpoint in a day, with no integration work.
Unified API
Submit circuits to a QUB using the same Open Quantum SDK and API you use for any other backend. $50 of free compute is included with every new account.
“Quantum technology is reaching a critical inflection point, moving from research into real-world commercial relevance.”
Frequently Asked Questions
Getting Started
Submit your first job to a Q-CTRL-powered QUB system in minutes. Sign up for a free Open Quantum account, install the SDK, and select a QUB backend. The Q-CTRL autonomous software layer handles calibration and error suppression automatically, so you get high-fidelity results from your first run.
$50 of Free Quantum Compute
Every new Open Quantum account includes $50 of free quantum compute credits, refreshed every 90 days. Run circuits on Q-CTRL-powered QUB systems and any other Open Quantum backend at no cost.
Explore Our Other Partners
qBitTensor Labs
Decentralized quantum-compute network
qBitTensor Labs operates the decentralized quantum-compute network on Bittensor Subnet 48, coordinating independent QPU operators so Open Quantum can offer real hardware at roughly half the cost, free to start.
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Quantum control electronics
Qblox Cluster and the Q1 pulse processor deliver the low-latency electronic control that manipulates qubits with precise pulses — the hardware backbone of the QUB architecture.
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Superconducting QPU hardware
QuantWare builds the high-coherence superconducting QPUs — including the Contralto-A and Contralto-D processors — with a VIO scaling path from tens to thousands of qubits.
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Denver-built dilution refrigerators and the ColdCloud platform. Open Quantum connects to Maybell telemetry so you can monitor your fridge from anywhere alongside running jobs.
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Federal Quantum Tech Hub
A federally designated Quantum Tech Hub across Colorado, New Mexico, and Wyoming. Quantum Rings is a consortium member, and Open Quantum brings its Q-PAC system online for cloud access.
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