启发式前瞻蒸馏协议搜索
Heuristic Lookahead Distillation Protocol Search
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中文总结 AI 辅助
本研究提出启发式前瞻蒸馏协议搜索方法，实现了更高的量子比特Werner态蒸馏速率，提升了量子比特去极化信道双向辅助量子容量的最优下界，推动了量子信息理论问题的解决。
中文摘要 AI 辅助
二分量子比特纠缠蒸馏是仅利用局域操作和经典通信将有噪声的纠缠比特（ebit）转换为纯纠缠比特的过程，是量子中继器的核心操作，支撑长距离量子通信、分布式量子计算等关键任务。本研究提出一种纠缠蒸馏协议搜索方法，利用该技术以高于已有协议的速率蒸馏量子比特Werner态；尤其通过在广泛信道参数范围内提升量子比特去极化信道双向辅助量子容量的已知最优下界，展示了新蒸馏策略的优势，推动了量子信息理论中长期存在的问题之一的解决。
英文摘要
Bipartite qubit entanglement distillation is the process of converting noisy ebits into pure ebits using only local operations and classical communication. This is a core operation for quantum repeaters, enabling such crucial tasks as long-distance quantum communication and distributed quantum computing. In this work, we introduce a method for searching for entanglement distillation protocols and, using this technique, distil qubit Werner states at a higher rate than could be achieved using previously discovered protocols. In particular, we demonstrate the advantage of our new distillation strategy by improving the best-known lower bound for the two-way-assisted quantum capacity of the qubit depolarising channel across a wide range of channel parameters, making progress in one of the long-standing problems of quantum information theory.
