Quantum storage of entangled telecom-wavelength photons in an erbium-doped optical fibre
Quantum storage of entangled telecom-wavelength photons in an erbium-doped optical fibre
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DOI：
10.1038/nphoton.2014.311
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发表时间：
2015-02-01
期刊：
影响因子：
35
通讯作者：
Tittel, Wolfgang
中科院分区：
文献类型：
--
作者：
Saglamyurek, Erhan;Jin, Jeongwan;Tittel, Wolfgang
未来量子互联网的实现需要在本地节点处理和存储量子信息，并使用自由空间和光纤链路将远程节点互连(1)。光的量子存储器(2)是这种量子网络的关键要素。然而，迄今为止，既没有一种非经典光态的原子量子存储器，其波长与标准电信光纤基础设施兼容，也没有一种基于光纤的量子存储器的实现，已被报道。在这里，我们展示了一个1532 nm波长的光子与一个795 nm光子纠缠的状态的存储和忠实回忆，在一个低温冷却的铒离子集成到一个20米长的硅纤维中，使用光子回声量子记忆协议。尽管目前的效率和存储时间有限，但我们的宽带光物质接口使基于光纤的量子网络更接近现实。
The realization of a future quantum Internet requires the processing and storage of quantum information at local nodes and interconnecting distant nodes using free-space and fibreoptic links(1). Quantum memories for light(2) are key elements of such quantum networks. However, to date, neither an atomic quantum memory for non- classical states of light operating at a wavelength compatible with standard telecom fibre infrastructure, nor a fibre-based implementation of a quantum memory, has been reported. Here, we demonstrate the storage and faithful recall of the state of a 1,532 nm wavelength photon entangled with a 795 nm photon, in an ensemble of cryogenically cooled erbium ions doped into a 20-m-long silica fibre, using a photon-echo quantum memory protocol. Despite its currently limited efficiency and storage time, our broadband light-matter interface brings fibre-based quantum networks one step closer to reality.