Functional quantum nodes for entanglement distribution over scalable quantum networks
Functional quantum nodes for entanglement distribution over scalable quantum networks
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DOI：
10.1126/science.1140300
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发表时间：
2007-06-01
期刊：
影响因子：
56.9
通讯作者：
Kimble, H. Jeff
中科院分区：
文献类型：
--
作者：
Chou, Chin-Wen;Laurat, Julien;Kimble, H. Jeff
我们演示了两个相距3米的远程量子节点之间的纠缠分布。这种分布涉及两对原子存储器的异步准备和存储的原子状态到光场的相干映射在一个有效的近最大偏振纠缠状态。纠缠是通过测量贝尔不等式的违反来验证的，它可以用于通信协议，如量子密码学。演示的量子节点和通道可以用作量子中继器的部分，为强大的长距离量子通信提供了必要的工具。
We demonstrated entanglement distribution between two remote quantum nodes located 3 meters apart. This distribution involves the asynchronous preparation of two pairs of atomic memories and the coherent mapping of stored atomic states into light fields in an effective state of near-maximum polarization entanglement. Entanglement is verified by way of the measured violation of a Bell inequality, and it can be used for communication protocols such as quantum cryptography. The demonstrated quantum nodes and channels can be used as segments of a quantum repeater, providing an essential tool for robust long-distance quantum communication.