QubiC: A Distributed Classical Control Architecture for Complex Quantum Processors

The execution of increasingly complex quantum circuits on a quantum processing unit (QPU) presents a significant challenge, not just for the quantum hardware itself, but also for the classical control and computation infrastructure. To meet this demand, the QubiC open-source control system is undergoing a major architectural evolution designed to coordinate a distributed network of classical resources. This work details the latest upgrades to the QubiC platform, which enable multiple control hardware units to operate as a single, cohesive system while deeply integrating with heterogeneous computing resources. This redesigned architecture allows for flexible interconnection and configuration, facilitating the tight coupling of real-time classical computation with the quantum experiment. We will showcase how this powerful hybrid approach has already enabled new scientific results. These advancements demonstrate a scalable and robust pathway for controlling the sophisticated QPUs necessary for the next generation of quantum computing.