Optimal entanglement generation for efficient hybrid quantum repeaters
Optimal entanglement generation for efficient hybrid quantum repeaters
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DOI：
10.1103/physreva.80.060303
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发表时间：
2009-12-01
影响因子：
2.9
通讯作者：
Imoto, Nobuyuki
中科院分区：
文献类型：
--
作者：
Azuma, Koji;Sota, Naoya;Imoto, Nobuyuki
我们提出了一种在混合量子中继器中产生相邻节点上量子存储器之间纠缠的现实协议。产生的纠缠只包括一种类型的误差，这使得有效的纠缠蒸馏成为可能。与已知的具有这种性质的协议相比，我们的协议具有理想的检测器，达到了理论上的成功概率极限和对Bell态的保真度，从而保证了中继器的更高效率。我们还表明，即使使用现实的阈值检测器，我们的协议的优势仍然存在。
We propose a realistic protocol to generate entanglement between quantum memories at neighboring nodes in hybrid quantum repeaters. Generated entanglement includes only one type of error, which enables efficient entanglement distillation. In contrast to the known protocols with such a property, our protocol with ideal detectors achieves the theoretical limit of the success probability and the fidelity to a Bell state, promising higher efficiencies in the repeaters. We also show that the advantage of our protocol remains even with realistic threshold detectors.