论文标题
1GHz电时产生的纠缠光子对的分布
1GHz clocked distribution of electrically generated entangled photon pairs
论文作者
论文摘要
量子网络对于实现分布式量子计算和量子通信至关重要。纠缠光子是一个关键资源，其应用程序（例如量子键分布，量子继电器和量子中继器）。集成在量子网络中的所有组件都必须同步，因此符合特定时钟频率。在量子密钥分布中，最成熟的技术，时钟速率已达到并超过1GHz。在这里，我们显示了第一个电脉冲的亚频率纠缠的光子源与以这种时钟速率运行的现有光纤网络兼容。纠缠的LED基于在主电信窗口中排放的INAS/INP量子点，其多光子概率为每个发射周期少于10％，最大纠缠保真度为89％。我们使用此设备来演示GHz在相距4.6公里之间安装的纤维网络上通过安装的纤维网络的纠缠量子的时钟分布。
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.
