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Related Experiment Videos

Photon heterodyning.

Youhei Okawa, Fuminori Omura, Yuhsuke Yasutake

    Optics Express
    |October 19, 2017
    PubMed
    Summary
    This summary is machine-generated.

    Researchers demonstrate single-photon interference in the time domain, observing self-heterodyning beats. This breakthrough enables new methods for quantum information processing and phase measurement with faint light.

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    Area of Science:

    • Quantum Optics
    • Photonics
    • Quantum Information Science

    Background:

    • Single-photon interference is a cornerstone of quantum mechanics.
    • Traditional experiments often rely on spatial interference.
    • Exploring temporal interference with single photons presents unique challenges.

    Purpose of the Study:

    • To perform single-photon interference experiments in the time domain.
    • To demonstrate self-heterodyning of single-photon fields.
    • To explore applications in quantum information processing.

    Main Methods:

    • Utilizing true single-photon streams.
    • Employing a field-quadratic detector for self-heterodyning.
    • Correlating time-series data to map cumulative detection events.

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  • Developing a virtual capture frame for analysis.

    • Main Results:

    • Clear observation of self-heterodyning beats in the time domain.
    • Demonstration of transient interference fringes, analogous to Young's two-slit experiment.
    • Successful mapping of temporal first-order coherence of single-photon fields.

    Conclusions:

    • Single-photon interference can be effectively performed in the time domain.
    • The technique allows for digital heterodyning with faint light.
    • This opens new avenues for phase measurement and quantum information processing.