Experimental entanglement of six photons in graph states

Experimental entanglement of six photons in graph states
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DOI:
10.1038/nphys507
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发表时间:
2007-02-01
期刊:
影响因子:
19.6
通讯作者:
Pan, Jian-Wei
Pan, Jian-Wei
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Lu, Chao-Yang;Zhou, Xiao-Qi;Pan, Jian-Wei

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图态(1-3)——可以用数学图表示的多部纠缠态——是量子计算(4)、量子纠错(3)、多粒子纠缠研究(1)以及非局域性(5-7)和退相干(8)的基本测试的重要资源。在这里,我们展示了六光子的实验纠缠和多量子位图态的工程(9-11)。我们已经创建了两个重要的图态例子,一个是六光子格林伯格-霍恩-塞林格态(5),这是迄今为止最大的光子薛定谔猫,另一个是六光子簇态(2),这是最先进的“单向量子计算机”(4)。通过微小的修改,我们的方法原则上允许我们创建各种进一步的图状态,因此可以为实验测试开辟道路,例如量子算法(4,12)或容错和损失的单向量子计算(13,14)。
Graph states(1-3)-multipartite entangled states that can be represented by mathematical graphs - are important resources for quantum computation(4), quantum error correction(3), studies of multiparticle entanglement(1) and fundamental tests of non-locality(5-7) and decoherence(8). Here, we demonstrate the experimental entanglement of six photons and engineering of multiqubit graph states(9-11). We have created two important examples of graph states, a six-photon Greenberger-Horne-Zeilinger state(5), the largest photonic Schrodinger cat so far, and a six-photon cluster state(2), a state-of-the-art 'one-way quantum computer'(4). With small modifications, our method allows us, in principle, to create various further graph states, and therefore could open the way to experimental tests of, for example, quantum algorithms(4,12) or loss- and fault-tolerant one-way quantum computation(13,14).