Optically Heralded Entanglement of Superconducting Systems in Quantum Networks,Physical Review Letters

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Optically Heralded Entanglement of Superconducting Systems in Quantum Networks
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-07-22 , DOI: 10.1103/physrevlett.127.040503
Stefan Krastanov _{1,

2} , Hamza Raniwala ₁ , Jeffrey Holzgrafe ₂ , Kurt Jacobs _{3,

4} , Marko Lončar ₂ , Matthew J Reagor ₅ , Dirk R Englund _{1,

6}

Affiliation

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.

中文翻译：

量子网络中超导系统的光预示纠缠

网络超导量子计算机是量子科学中长期存在的挑战。典型的方法是级联换能器：在发射器处转换为光频，在接收器处转换为微波频率。然而，小的微波-光耦合和增加的噪声已被证明是巨大的障碍。相反，我们通过预示与一个检测到的光子和隐形传态的端到端纠缠来提出光网络。这种新协议可以在标准转导硬件上实现，同时提供显着的转导性能改进。与级联直接转导相比，我们的方案将低光-微波耦合效率吸收到预兆步骤中，从而打破了速率-保真度的权衡。而且，

更新日期：2021-07-22

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