High-fidelity transfer and storage of photon states in a single nuclear spin
High-fidelity transfer and storage of photon states in a single nuclear spin
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DOI：
10.1038/nphoton.2016.103
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发表时间：
2016-08-01
期刊：
影响因子：
35
通讯作者：
Wrachtrup, Joerg
中科院分区：
文献类型：
--
作者：
Yang, Sen;Wang, Ya;Wrachtrup, Joerg
长距离量子通信需要光子和量子节点，这些节点包括用于与光相互作用的量子比特和良好的记忆能力，以及处理用于存储和操作光子的量子比特。由于不可避免的光子损耗，在有损传输信道上的健壮量子通信需要量子中继器网络(1，2)。这些网络的一个必要和非常苛刻的先决条件是存在具有长相干时间的量子存储器，以可靠地存储入射光子态。在这里，我们展示了高保真(类似于98%)的光子偏振态到单个固态核自旋的相干转移，其相干时间超过10 S。存储过程是通过将光子的偏振态相干转移到金刚石中氮空位中心的纠缠电子-核自旋态来实现的。这里展示的基于核自旋的光量子存储器为基于吸收的量子中继器网络铺平了道路。长距离量子通信需要光子和量子节点，这些节点包括用于与光相互作用的量子比特和良好的记忆能力，以及处理用于存储和操作光子的量子比特。由于不可避免的光子损耗，在有损传输信道上的健壮的量子通信需要量子中继器网络1，2。这些网络的一个必要和高要求的前提是存在具有长相干时间的量子存储器来可靠地存储入射光子态。在这里，我们展示了高保真(类似于98%)的光子偏振态到单个固态核自旋的相干转移，其相干时间超过10 S。存储过程是通过将光子的偏振态相干转移到金刚石中氮空位中心的纠缠电子核自旋态来实现的。这里展示的基于核自旋的光量子存储器为基于吸收的量子中继器网络铺平了道路。
Long-distance quantum communication requires photons and quantum nodes that comprise qubits for interaction with light and good memory capabilities, as well as processing qubits for the storage and manipulation of photons. Owing to the unavoidable photon losses, robust quantum communication over lossy transmission channels requires quantum repeater networks(1,2). A necessary and highly demanding prerequisite for these networks is the existence of quantum memories with long coherence times to reliably store the incident photon states. Here we demonstrate the high-fidelity (similar to 98%) coherent transfer of a photon polarization state to a single solid-state nuclear spin that has a coherence time of over 10 s. The storage process is achieved by coherently transferring the polarization state of a photon to an entangled electron-nuclear spin state of a nitrogen-vacancy centre in diamond. The nuclear spin-based optical quantum memory demonstrated here paves the way towards an absorption-based quantum repeater network. Long-distance quantum communication requires photons and quantum nodes that comprise qubits for interaction with light and good memory capabilities, as well as processing qubits for the storage and manipulation of photons. Owing to the unavoidable photon losses, robust quantum communication over lossy transmission channels requires quantum repeater networks1,2. A necessary and highly demanding prerequisite for these networks is the existence of quantum memories with long coherence times to reliably store the incident photon states. Here we demonstrate the high-fidelity (similar to 98%) coherent transfer of a photon polarization state to a single solid-state nuclear spin that has a coherence time of over 10 s. The storage process is achieved by coherently transferring the polarization state of a photon to an entangled electronnuclear spin state of a nitrogen-vacancy centre in diamond. The nuclear spin-based optical quantum memory demonstrated here paves the way towards an absorption-based quantum repeater network.