论文标题
在被困的离子量子网络节点中稳健的量子存储器
Robust Quantum Memory in a Trapped-Ion Quantum Network Node
论文作者
论文摘要
我们将长寿命的内存量子置量集成到混合物种被困的量子网络节点中。首先用SR-88中的网络量子置量生成的离子 - 光子纠缠以0.977（7）的保真度传输到CA-43，并映射到可靠的内存量子位。然后，我们将网络量子轴与第二个光子纠缠，而不会影响内存量子标题。我们执行量子状态断层扫描，以表明离子纠缠的忠诚度在内存量子位上的速度慢了约70倍。动力解耦进一步扩展了存储持续时间；我们在10s后测量一个离子 - 光子纠缠的保真度为0.81（4）。
We integrate a long-lived memory qubit into a mixed-species trapped-ion quantum network node. Ion-photon entanglement first generated with a network qubit in Sr-88 is transferred to Ca-43 with 0.977(7) fidelity, and mapped to a robust memory qubit. We then entangle the network qubit with a second photon, without affecting the memory qubit. We perform quantum state tomography to show that the fidelity of ion-photon entanglement decays ~70 times slower on the memory qubit. Dynamical decoupling further extends the storage duration; we measure an ion-photon entanglement fidelity of 0.81(4) after 10s.
