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Multiphoton Graph States from a Solid-State Single-Photon Source
ACS Photonics ( IF 6.864 ) Pub Date : 2020-06-05 , DOI: 10.1021/acsphotonics.0c00192
Jin-Peng Li; Jian Qin; Ang Chen; Zhao-Chen Duan; Ying Yu; YongHeng Huo; Sven Höfling; Chao-Yang Lu; Kai Chen; Jian-Wei Pan

Photonic graph states are underlying resources for one-way optical quantum computation, quantum error correction, fundamental testing of quantum mechanics, and quantum communication networks. Most existing works, however, are based on the spontaneous parametric down-conversion sources that intrinsically suffer from probabilistic generation and double pair components. Here, we create two important classes of graph states, a polarization-encoded four-photon Greenberger–Horne–Zeilinger (GHZ) state and a linear cluster state, by actively demultiplexing a deterministic single-photon source from a semiconductor quantum dot embedded in a micropillar. A state fidelity of 0.790 ± 0.009 (0.763 ± 0.004) and a count rate of ∼13 Hz are observed for the four-photon GHZ (cluster) state. The results constitute a new route toward the multiphoton entanglement with deterministic single-photon sources.
更新日期:2020-07-15

 

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