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Scalable integrated single-photon source

Science advances, 2020-12, Vol.6 (50) [Peer Reviewed Journal]

Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). ;Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). 2020 The Authors ;ISSN: 2375-2548 ;EISSN: 2375-2548 ;DOI: 10.1126/sciadv.abc8268 ;PMID: 33298444

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  • Title:
    Scalable integrated single-photon source
  • Author: Uppu, Ravitej ; Pedersen, Freja T ; Wang, Ying ; Olesen, Cecilie T ; Papon, Camille ; Zhou, Xiaoyan ; Midolo, Leonardo ; Scholz, Sven ; Wieck, Andreas D ; Ludwig, Arne ; Lodahl, Peter
  • Subjects: Optics ; Physics ; SciAdv r-articles
  • Is Part Of: Science advances, 2020-12, Vol.6 (50)
  • Description: Photonic qubits are key enablers for quantum information processing deployable across a distributed quantum network. An on-demand and truly scalable source of indistinguishable single photons is the essential component enabling high-fidelity photonic quantum operations. A main challenge is to overcome noise and decoherence processes to reach the steep benchmarks on generation efficiency and photon indistinguishability required for scaling up the source. We report on the realization of a deterministic single-photon source featuring near-unity indistinguishability using a quantum dot in an "on-chip" planar nanophotonic waveguide circuit. The device produces long strings of >100 single photons without any observable decrease in the mutual indistinguishability between photons. A total generation rate of 122 million photons per second is achieved, corresponding to an on-chip source efficiency of 84%. These specifications of the single-photon source are benchmarked for boson sampling and found to enable scaling into the regime of quantum advantage.
  • Publisher: United States: American Association for the Advancement of Science
  • Language: English
  • Identifier: ISSN: 2375-2548
    EISSN: 2375-2548
    DOI: 10.1126/sciadv.abc8268
    PMID: 33298444
  • Source: PubMed Central
    DOAJ Directory of Open Access Journals
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