Building Quantum Computers from Open-Architecture Components
Applied Quantum builds quantum computing platforms from modular, QOA-compliant components and delivers them fully operational. We select and procure the best available QPUs, control electronics, and cryogenic systems from the open ecosystem, assemble and integrate the hardware, develop the software stack, and hand you a working quantum computer — with sovereign optionality, a clear upgrade path, and at a fraction of the cost of monolithic systems from vertically integrated vendors.
Our Expertise
Our platform integration practice covers the complete lifecycle of building a quantum computer from open-architecture components. We understand the engineering at every layer of the stack — from millikelvin cryogenics and microwave signal chains to control firmware and system-level orchestration — and we have the vendor relationships, architectural knowledge, and integration methodology to bring it all together into a working system.
Architecture and Component Selection
Every platform build starts with understanding your target applications, qubit requirements, operational constraints, and sovereignty needs. We design the system architecture and evaluate QOA-compliant components from across the open ecosystem — QPUs, control electronics, cryogenic platforms, wiring, readout chains, and ancillary hardware. We select the best components for your specific requirements, manage procurement, and coordinate with vendors. The architecture is documented in detail, with every interface specified and every design decision traceable.
Hardware Assembly and Integration
We integrate the hardware: mounting the QPU in the cryostat, connecting the control electronics via the appropriate wiring and attenuation stages, configuring the readout chain, and establishing the room-temperature to millikelvin signal path. Cross-vendor interface resolution is where much of the real engineering happens — making components from different manufacturers work together reliably is non-trivial and requires deep understanding of signal integrity, thermal management, and electromagnetic compatibility. We work in your facility or coordinate with specialist lab partners.
Software Stack Development
A quantum computer is not operational without the software layer that controls it. As part of every platform build, we develop and deploy the integration software — hardware abstraction, calibration pipelines, control interfaces, and system management tools. For the full scope of our software integration capability, see our Quantum OS, Middleware & Integration Layer Development service.
Commissioning and Delivery
We bring the system up, run initial calibration, and benchmark against agreed performance targets. We deliver a validated, operational quantum computer with full documentation, operational runbooks, and training for your team. The system is ready for production use — not a prototype or proof of concept.
The Open-Architecture Advantage
An AQ-integrated open-architecture system gives you three things a monolithic vendor cannot: cost efficiency (you pay for best-of-breed components, not one vendor’s entire R&D stack), sovereign optionality (every component can be sourced, replaced, or upgraded independently — no single-vendor lock-in), and upgradability (when better QPUs emerge, you swap the chip, not the whole system). This is the model that enabled Italy’s University of Naples to stand up the country’s largest quantum computer from commercially available components.
Whether you are a national quantum programme, a defence organisation, a research institution, or an enterprise establishing a quantum computing lab — we build quantum computers that you own and control. Contact us to discuss your platform requirements.
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