12-Photon Entanglement and Scalable Scattershot Boson Sampling with Optimal Entangled-Photon Pairs from Parametric Down-Conversion
12-Photon Entanglement and Scalable Scattershot Boson Sampling with Optimal Entangled-Photon Pairs from Parametric Down-Conversion
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12 光子纠缠和可扩展散射玻色子采样，具有来自参数下转换的最佳纠缠光子对
DOI：
10.1103/physrevlett.121.250505
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发表时间：
2018
影响因子：
8.6
通讯作者：
Pan Jian-Wei
中科院分区：
文献类型：
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作者：
Zhong Han-Sen;Li Yuan;Li Wei;Peng Li-Chao;Su Zu-En;Hu Yi;He Yu-Ming;Ding Xing;Zhang Weijun;Li Hao;Zhang Lu;Wang Zhen;You Lixing;Wang Xi-Lin;Jiang Xiao;Li Li;Chen Yu-Ao;Liu Nai-Le;Lu Chao-Yang;Pan Jian-Wei
同时具有近统一预警效率和不可区分性的纠缠光子源是可扩展光子量子技术的基本要素。设计并实现了一种超快脉冲激光泵浦自发参数下转换（SPDC）的简并电信波长纠缠光子源，该源在没有窄带滤波的情况下同时具有97%的预警效率和96%的独立单光子不可分辨性。这种束状和频率不相关的SPDC源允许产生第一个12光子的真正纠缠，状态保真度为。我们进一步展示了使用12个SPDC源和模式干涉仪进行3、4和5玻色子采样的可扩展散射玻色子采样蓝图，其计数率比以前所有SPDC实验高出4个数量级以上。
Entangled-photon sources with simultaneously near-unity heralding efficiency and indistinguishability are the fundamental elements for scalable photonic quantum technologies. We design and realize a degenerate telecommunication wavelength entangled-photon source from an ultrafast pulsed laser pumped spontaneous parametric down-conversion (SPDC), which shows simultaneously 97% heralding efficiency and 96% indistinguishability between independent single photons without narrow-band filtering. Such a beamlike and frequency-uncorrelated SPDC source allows generation of the first 12-photon genuine entanglement with a state fidelity of. We further demonstrate a blueprint of scalable scattershot boson sampling using 12 SPDC sources and amode interferometer for three-, four-, and five-boson sampling, which yields count rates more than 4 orders of magnitude higher than all previous SPDC experiments.