论文标题
在现实嘈杂的纠缠在场的情况下直接量子通信
Direct Quantum Communications in the Presence of Realistic Noisy Entanglement
论文作者
论文摘要
要实现量子互联网,量子通信需要量子节点之间的预共享纠缠。然而,最大输入量子状态的产生和分布都固有地被量子反应污染。通常,通过执行量子纠缠蒸馏的连续步骤,然后进行量子传送。但是,这种常规方法施加了很长的延迟。为了避免这种障碍,我们提出了一种新颖的量子通信方案,该方案依靠现实的嘈杂的预共享纠缠,从而消除了标准方法中延迟的顺序步骤。更确切地说,我们提出的方案可以被视为一种直接的量子通信方案,尽管依赖于逼真的嘈杂的预共享纠缠,但能够改善逻辑Qubit的量子位误差比(QBER)。我们的绩效分析表明,与现有的最新量子通信方案相比,提出的计划提供了具有竞争力的QBER,收益率和优质,尽管需要更少的量子门。
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.