The Fault Tolerant Extension for your Quantum Control System

Current QPU control systems are highly successful in pulse-level qubit control. We demonstrate a route to complement these systems with a quantum error correction system. The modular integration of these systems via a common data interface provides scalability, improved resilience, and facilitates interoperability.

The design of a QEC-capable control system brings challenges. For example, passing syndromes over the data interface necessitates that the QPU control system is able to route readout data to the right set of decoders, and that both QPU control and QEC processors connect to the routing system through interrupts or mailboxes. These are low-level software and micro-architectural hardware features that must be implemented coherently in both systems. We also discuss how a cloud-connected user can perform QEC calculations based on hardware actions that go beyound the QPU’s native gates.

We describe connecting Riverlane’s QEC system with Infleqtion’s neutral atom quantum computer at the UK National Quantum Computing Center. We present preliminary results from small scale quantum memory experiments and outline the additional steps required for future experiments which leverage the advantages of neutral atoms using, for instance qLDPC