Noise-Aware Detectable Byzantine Agreement for Consensus-based Distributed Quantum Computing

This paper introduces a noise-aware Byzantine agreement protocol tailored for distributed quantum computing (DQC), combining error mitigation and secure verification mechanisms. Key features include:

• Integration of Quantum Readout Error Mitigation (QREM) and Dynamical Decoupling (DD) to combat quantum channel noise on NISQ devices.
• A QKD-inspired verification mechanism to ensure reliable command transmission among distributed nodes.
• A detectable consensus protocol that enables lieutenants to systematically resolve discrepancies based on the commander’s input and network configuration.

Empirical results on IBM quantum hardware and simulations confirm enhanced fault tolerance, security, and scalability, paving the way for robust DQC coordination in adversarial settings.

Recommended citation: Chen, Kuan-Cheng; Prest, Matthew; Burt, Felix; Yu, Shang; & Leung, Kin K. (2025). "Noise-Aware Detectable Byzantine Agreement for Consensus-based Distributed Quantum Computing." Proceedings of the 2025 International Conference on Quantum Communications, Networking, and Computing (QCNC), 210–215.
Download Paper