Multiphoton graph states from a solid-state single-photon source
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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.
Li , J-P , Qin , J , Chen , A , Duan , Z-C , Yu , Y , Huo , Y , Hoefling , S , Lu , C-Y , Chen , K & Pan , J-W 2020 , ' Multiphoton graph states from a solid-state single-photon source ' , ACS Photonics , vol. 7 , no. 7 , pp. 1603-1610 . https://doi.org/10.1021/acsphotonics.0c00192
Copyright © 2020 American Chemical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1021/acsphotonics.0c00192.
DescriptionThis work was supported by the National Natural Science Foundation of China (Grants No. 11575174, No. 11674308, No. 11704424, and No. 11774326), the Chinese Academy of Sciences, and the National Key Research and Development Program of China.
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