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Updated: Jan 4, 2026

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8×8 reconfigurable quantum photonic processor based on silicon nitride waveguides.

Caterina Taballione, Tom A W Wolterink, Jasleen Lugani

    Optics Express
    |November 2, 2019
    PubMed
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    Researchers developed the largest programmable silicon nitride photonic circuit for quantum information processing. This reconfigurable 8x8 network enables arbitrary linear transformations, paving the way for scalable quantum technologies.

    Area of Science:

    • Integrated photonics
    • Quantum information processing
    • Optical quantum computing

    Background:

    • Large-scale optical quantum information processing relies on stable and reconfigurable integrated photonic circuits.
    • Silicon nitride waveguides offer a promising platform due to their low loss and fabrication compatibility.

    Purpose of the Study:

    • To demonstrate a reconfigurable 8x8 integrated linear optical network for quantum information processing.
    • To showcase a novel optical architecture enabling arbitrary linear transformations.
    • To validate key photonic quantum information processing primitives on a large-scale programmable circuit.

    Main Methods:

    • Fabrication of an 8x8 integrated linear optical network using silicon nitride waveguides.
    • Implementation of a novel optical architecture for arbitrary linear transformations.

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    Related Experiment Videos

    Last Updated: Jan 4, 2026

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  • Experimental validation of quantum information processing primitives, including Hong-Ou-Mandel interference, bosonic coalescence/anti-coalescence, and high-dimensional single-photon quantum gates.

    • Main Results:

    • Demonstration of the largest programmable photonic circuit reported to date on the silicon nitride platform.
    • Successful implementation of arbitrary linear transformations.
    • High fidelities achieved in validating various quantum information processing primitives.

    Conclusions:

    • The developed silicon nitride photonic circuit represents a significant advancement for large-scale quantum information processing.
    • The demonstrated reconfigurability and high fidelities highlight the potential of integrated photonics for future quantum technologies.
    • Low-loss silicon nitride is a viable platform for building complex and scalable photonic quantum processors.