Logical multi-qubit entanglement with dual-rail superconducting qubits
Wenhui Huang et al. · 2025 · Nature Physics
| 编号 QE360 | 主题 硬件实验与里程碑 | 链接 arXiv:2504.12099 |
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。
Recent advances in quantum error correction (QEC) across hardware platforms have demonstrated operation near and beyond the fault-tolerance threshold, yet achieving exponential suppression of logical errors through code scaling remains a critical challenge. Erasure qubits, which enable hardware-level detection of dominant error types, offer a promising path toward resource-efficient QEC by exploiting error bias. Single erasure qubits with dual-rail encoding in superconducting cavities and transmons have demonstrated high coherence and low single-qubit gate errors with mid-circuit erasure detection, but the generation of multi-qubit entanglement—a fundamental requirement for quantum computation and error correction—has remained an outstanding milestone. Here, we demonstrate a superconducting processor integrating four dual-rail erasure qubits that achieves the logical multi-qubit entanglement with error-biased protection. Each dual-rail qubit, encoded in pairs of tunable transmons, preserves millisecond-scale coherence times and single-qubit gate errors at the level of . By engineering tunable couplings between logical qubits, we generate high-fidelity entangled states re
本站词条在引用该文献时，会以 wikilink（sources/QE360）链接到本页；右侧「反向链接」面板自动列出所有引用它的词条。