1GHz clocked distribution of electrically generated entangled photon pairs.
1GHz clocked distribution of electrically generated entangled photon pairs.
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DOI：
10.1364/oe.405466
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发表时间：
2020-04
期刊：
影响因子：
3.8
通讯作者：
G. Shooter;Z. Xiang;Jonathan R. A. Müller;J. Skiba-Szymanska;J. Huwer;J. Griffiths;T. Mitchell
中科院分区：
文献类型：
--
作者：
G. Shooter;Z. Xiang;Jonathan R. A. Müller;J. Skiba-Szymanska;J. Huwer;J. Griffiths;T. Mitchell
量子网络是实现分布式量子计算和量子通信的基础。纠缠光子是一种关键资源，其应用包括量子密钥分配、量子中继和量子中继器。集成在量子网络中的所有组件都必须同步，因此符合一定的时钟频率。在量子密钥分发中，最成熟的技术，时钟速率已经达到并超过1GHz。在这里，我们展示了第一个电脉冲亚泊松纠缠光子源与现有的光纤网络在这个时钟速率下运行兼容。纠缠LED基于InAs/InP量子点在主电信窗口发射，每个发射周期的多光子概率小于10%，最大纠缠保真度为89%。我们使用这个设备来演示GHz时钟的纠缠量子比特分布在一个安装的光纤网络之间的两个点4.6公里。
Quantum networks are essential for realising distributed quantum computation and quantum communication. Entangled photons are a key resource, with applications such as quantum key distribution, quantum relays, and quantum repeaters. All components integrated in a quantum network must be synchronised and therefore comply with a certain clock frequency. In quantum key distribution, the most mature technology, clock rates have reached and exceeded 1GHz. Here we show the first electrically pulsed sub-Poissonian entangled photon source compatible with existing fiber networks operating at this clock rate. The entangled LED is based on InAs/InP quantum dots emitting in the main telecom window, with a multi-photon probability of less than 10% per emission cycle and a maximum entanglement fidelity of 89%. We use this device to demonstrate GHz clocked distribution of entangled qubits over an installed fiber network between two points 4.6km apart.