Fault-tolerant measurement-free quantum error correction with multi-qubit gates

Michael A. Perlin, Vickram N. Premakumar, Jiakai Wang, Mark Saffman, Robert Joynt · 2020 · Phys. Rev. A 108, 062426 (2023)（arXiv 2020-07）

| 编号 QE208 | 主题 Floquet 与动态码 | 链接 arXiv:2007.09804 |

摘要

摘要保留原文（英文）

摘要取自 arXiv / 出版方元数据，未作翻译，以保证与原文一致。

MFQEC replaces syndrome measurement, classical decoding and correction by a coherent decoding step that pumps entropy into ancilla qubits, followed by unconditional reset. We show previous circuits lose fault tolerance to ancilla phase errors, fix the design by reversing data/ancilla roles, and obtain pseudothresholds of 0.7% (0.1% for the copy-assisted Steane variant under fully depolarizing noise).

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