Optically Heralded Entanglement of Superconducting Systems in Quantum Networks
Optically Heralded Entanglement of Superconducting Systems in Quantum Networks
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DOI：
10.1103/physrevlett.127.040503
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发表时间：
2021-07-22
影响因子：
8.6
通讯作者：
Englund, Dirk R.
中科院分区：
文献类型：
--
作者：
Krastanov, Stefan;Raniwala, Hamza;Englund, Dirk R.
将超导量子计算机联网是量子科学中的一个长期挑战。典型的方法是级联换能器：在发射机转换成光学频率，在接收器转换成微波频率。然而，小的微波-光学耦合和增加的噪声已被证明是巨大的障碍。相反，我们提出了通过一个探测到的光子的端到端纠缠和隐形传态来实现光网络。这种新的协议可以在标准的传输硬件上实现，同时提供了比传输显著的性能改进。与级联直接传输相比，我们的方案将低的光-微波耦合效率吸收到先导步骤中，从而打破了速率保真度之间的权衡。此外，这项技术统一并简化了超导器件与量子网络中其他物理形式之间的纠缠产生。
Networking superconducting quantum computers is a longstanding challenge in quantum science. The typical approach has been to cascade transducers: converting to optical frequencies at the transmitter and to microwave frequencies at the receiver. However, the small microwave-optical coupling and added noise have proven formidable obstacles. Instead, we propose optical networking via heralding end-to-end entanglement with one detected photon and teleportation. This new protocol can be implemented on standard transduction hardware while providing significant performance improvements over transduction. In contrast to cascaded direct transduction, our scheme absorbs the low optical-microwave coupling efficiency into the heralding step, thus breaking the rate-fidelity trade-off. Moreover, this technique unifies and simplifies entanglement generation between superconducting devices and other physical modalities in quantum networks.