A Scalable Open-Source RISC-V-Based Quantum Error Correction System with Sub-Microsecond Decoding Latency: Part I

Quantum error correction (QEC) is essential for realizing large-scale quantum computation, yet its practical implementation remains a major engineering challenge. In particular, QEC demands precise real-time control of a large number of qubits and low-latency, high-throughput decoding of error syndromes. To address these challenges, we present an open-source quantum error correction system built on RISC-Q, a generator for RISC-V-based quantum control systems. Our system, implemented on RFSoC FPGAs, achieves real-time qubit control, a scalable distributed multi-board architecture, and a low-latency QEC decoding pipeline with sub-microsecond (<1 μs) latency for configurations up to 56 qubits. In the first part of the talk, we will introduce the RISC-Q generator, a RISC-V-based open-source framework for quantum control systems, and our implementation of the real-time RF signal processing system for qubit control.