Deterministic Generation of All-Photonic Quantum Repeaters from Solid-State Emitters
Deterministic Generation of All-Photonic Quantum Repeaters from Solid-State Emitters
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DOI：
10.1103/physrevx.7.041023
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发表时间：
2017-10-27
影响因子：
12.5
通讯作者：
Economou, Sophia E.
中科院分区：
文献类型：
--
作者：
Buterakos, Donovan;Barnes, Edwin;Economou, Sophia E.
量子中继器是量子通信网络中的节点，可以实现长距离可靠的纠缠传输。最近的研究表明，所谓图态的高度纠缠光子可用于全光子量子中继器，与基于原子存储器的中继器相比，它需要的资源要少得多。然而，通过成对概率纠缠生成构建多光子纠缠态的标准方法严重限制了可以创建的状态的大小。在这里，我们提出了一种使用半导体量子点和固体缺陷中心等量子发射器确定性生成大型光子中继器状态的协议。我们证明，仅使用一个耦合到单个量子位的发射器就可以生成任意大的中继器状态，从而可能将所需的光子源数量减少多个数量级。我们的协议包括内置冗余，这使得它能够抵抗光子损失。
Quantum repeaters are nodes in a quantum communication network that allow reliable transmission of entanglement over large distances. It was recently shown that highly entangled photons in so-called graph states can be used for all-photonic quantum repeaters, which require substantially fewer resources compared to atomic-memory-based repeaters. However, standard approaches to building multiphoton entangled states through pairwise probabilistic entanglement generation severely limit the size of the state that can be created. Here, we present a protocol for the deterministic generation of large photonic repeater states using quantum emitters such as semiconductor quantum dots and defect centers in solids. We show that arbitrarily large repeater states can be generated using only one emitter coupled to a single qubit, potentially reducing the necessary number of photon sources by many orders of magnitude. Our protocol includes a built-in redundancy, which makes it resilient to photon loss.