Direct Quantum Communications in the Presence of Realistic Noisy Entanglement
Direct Quantum Communications in the Presence of Realistic Noisy Entanglement
复制标题
DOI：
10.1109/tcomm.2021.3122786
复制
发表时间：
2020-12
影响因子：
8.3
通讯作者：
Daryus Chandra;A. Cacciapuoti;M. Caleffi;L. Hanzo
中科院分区：
文献类型：
--
作者：
Daryus Chandra;A. Cacciapuoti;M. Caleffi;L. Hanzo
为了实现量子互联网，量子通信需要量子节点之间预先共享纠缠。然而，最大纠缠量子态的产生和分布本质上都受到量子退相干的污染。传统上，通过执行量子纠缠蒸馏和量子隐形传态的连续步骤来减轻量子退相干。然而，这种传统方法会造成较长的延迟。为了规避这一障碍，我们提出了一种新颖的量子通信方案，该方案依赖于现实的噪声预共享纠缠，消除了标准方法中施加延迟的顺序步骤。更准确地说，我们提出的方案可以被视为一种直接量子通信方案，尽管依赖于现实的噪声预共享纠缠，但仍能够提高逻辑量子位的量子误码率（QBER）。我们的性能分析表明，尽管需要更少的量子门，但与现有最先进的量子通信方案相比，所提出的方案提供了有竞争力的 QBER、产量和吞吐量。
To realize the Quantum Internet, quantum communications require pre-shared entanglement among quantum nodes. However, both the generation and the distribution of the maximally-entangled quantum states are inherently contaminated by quantum decoherence. Conventionally, the quantum decoherence is mitigated by performing the consecutive steps of quantum entanglement distillation followed by quantum teleportation. However, this conventional approach imposes a long delay. To circumvent this impediment, we propose a novel quantum communication scheme relying on realistic noisy pre-shared entanglement, which eliminates the sequential steps imposing delay in the standard approach. More precisely, our proposed scheme can be viewed as a direct quantum communication scheme capable of improving the quantum bit error ratio (QBER) of the logical qubits despite relying on realistic noisy pre-shared entanglement. Our performance analysis shows that the proposed scheme offers competitive QBER, yield, and goodput compared to the existing state-of-the-art quantum communication schemes, despite requiring fewer quantum gates.