Scalable Integrated Single-photon Source

Overview

Journal Sci Adv

Specialties Biology
Science

Date 2020 Dec 10

PMID 33298444

Citations 25

Authors

Ravitej Uppu

Freja T Pedersen

Ying Wang

Cecilie T Olesen

Camille Papon

Xiaoyan Zhou

Leonardo Midolo

Sven Scholz

Andreas D Wieck

Arne Ludwig

Peter Lodahl

Affiliations

Soon will be listed here.

Abstract

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.

Citing Articles

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Information processing at the speed of light.

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Meng Y, Chan M, Nielsen R, Appel M, Liu Z, Wang Y Nat Commun. 2024; 15(1):7774.

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