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Multiphoton Graph States from a Solid-State Single-Photon Source
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DOI：10.1021/acsphotonics.0c00192.png)
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Abstract
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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 similar to 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.
Keywords:
multiphoton entanglement graph states
four-photon GHZ state
four-photon linear cluster state
one-way quantum computation
solid-state single-photon source
semiconductor quantum dot
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