Modular Quantum Computing with Superconducting Qubits

Superconducting qubits provide a promising approach to large-scale fault-tolerant quantum computing. However, as superconducting quantum processors scale out of the NISQ era, monolithic architectures face severe physical bottlenecks caused by physical wiring density, crosstalk, and constraints on spatial layout. Transitioning toward a modular paradigm—where smaller, independently optimized quantum processing units are dynamically interconnected—offers a highly scalable alternative. Here, we present our work on developing a scalable, modular superconducting quantum processor based on a reconfigurable router architecture. We demonstrate how this design enables efficient quantum operations across independent modules and smooth integration with state-of-the-art quantum optimal control paradigms, together with correlated-error suppression capabilities. These results pave the way for modular quantum computing and offer a promising approach to scaling to larger-scale quantum circuits.