Summary
Today’s quantum computers are monoliths, single-vendor black boxes. The article argues quantum is entering the same transition classical computing made from mainframes to open architectures. Quantum Open Architecture defines standardized, interchangeable components, and Quantum Systems Integration is the discipline that selects, combines, tests, and operates them.
The roadmap spans three layers. First, a structural shift from monoliths to modules assembled by integrators. Second, disaggregation and reassembly of the technical stack, from control electronics and firmware to operating systems and heterogeneous qubit back ends. Third, delivery models that shape access through cloud, on-premises, or hybrid services with open interfaces.
For security leaders, modularity brings both assurance and new risk. Open standards enable competition, certification, SBOMs, lifecycle controls, and clearer trust boundaries, reducing vendor lock-in. At the same time, more interfaces and suppliers expand the attack surface, so the stack must adopt security by design, PQC in control and management planes, hardware roots of trust, auditable telemetry, and strong supply chain governance. QOA and QSI signal the industrialization of quantum, turning physics experiments into engineered platforms you can procure, evaluate, and secure.
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See the original article at: https://postquantum.com/quantum-systems-integration/quantum-open-architecture-qoa-qsi/