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Related Experiment Video

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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
12:19

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

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Testing multi-photon interference on a silicon chip.

Bryn A Bell, Guillaume S Thekkadath, Renyou Ge

    Optics Express
    |December 28, 2019
    PubMed
    Summary
    This summary is machine-generated.

    Researchers demonstrate multi-photon interference in silicon photonics, achieving up to 5 photons in 15 modes. This advances quantum computing and boson sampling experiments by overcoming previous loss limitations.

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    Area of Science:

    • Quantum Information Science
    • Integrated Photonics
    • Quantum Optics

    Background:

    • Multi-photon interference in large interferometers is crucial for quantum computing and boson sampling.
    • Silicon photonics offers miniaturized, complex circuits for quantum experiments.
    • Loss in silicon photonics has historically limited multi-photon experiments.

    Purpose of the Study:

    • To demonstrate high-efficiency multi-photon interference in silicon photonic circuits.
    • To overcome loss limitations in integrated quantum optical systems.
    • To advance the scalability of boson sampling and quantum computing.

    Main Methods:

    • Utilizing high-efficiency grating couplers to integrate ppKTP waveguide quantum light sources with silicon circuits.
    • Implementing interference of up to 5 photons within a 15-mode silicon photonic interferometer.
    • Comparing experimental results against theoretical models to verify genuine multi-photon interference.

    Main Results:

    • Successful demonstration of multi-photon interference with up to 5 photons in 15 modes.
    • High-efficiency coupling of quantum light sources to silicon photonic integrated circuits.
    • Validation of quantum interference through comparison with theoretical models, accounting for photon distinguishability.

    Conclusions:

    • Silicon photonics, enhanced by efficient coupling, can support complex multi-photon interference experiments.
    • The demonstrated approach mitigates loss, paving the way for larger-scale quantum optical systems.
    • This work represents a significant step towards scalable boson sampling and linear optical quantum computing.