From quantum multiplexing to high-performance quantum networking
From quantum multiplexing to high-performance quantum networking
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DOI：
10.1038/nphoton.2010.213
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发表时间：
2010-11-01
期刊：
影响因子：
35
通讯作者：
Nemoto, Kae
中科院分区：
文献类型：
--
作者：
Munro, W. J.;Harrison, K. A.;Nemoto, Kae
量子中继器将是量子通信和量子计算的关键。在这里，我们描述了一种机制，它允许在通过光纤连接的两个量子比特之间创建纠缠，概率任意接近一，并且在固定的时间内。我们展示了如何扩展这一机制以确保纠缠具有高保真度而不损害这些性质。最后，我们描述了如何使用它来构建一个量子中继器，该中继器能够创建一个连接两个遥远的高保真量子比特的线性量子网络。通信速率被证明是任意两个相邻量子中继器之间最大距离的函数，而不是网络的整个长度的函数。
Quantum repeaters will be critical to quantum communication and quantum computation. Here, we describe a mechanism that permits the creation of entanglement between two qubits, connected by fibre, with probability arbitrarily close to one and in constant time. We show how this mechanism may be extended to ensure that the entanglement has high fidelity without compromising these properties. Finally, we describe how it may be used to construct a quantum repeater that is capable of creating a linear quantum network connecting two distant qubits with high fidelity. The communication rate is shown to be a function of the maximum distance between any two adjacent quantum repeaters rather than of the entire length of the network.