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Related Experiment Video

Updated: Jul 12, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

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Hyper-entanglement between pulse modes and frequency bins.

Fabrizio Chiriano, Joseph Ho, Christopher L Morrison

    Optics Express
    |October 20, 2023
    PubMed
    Summary
    This summary is machine-generated.

    We generated photon pairs hyper-entangled in pulse modes and frequency bins, enhancing quantum communication. This hyper-entanglement combines energy-time properties with increased channel capacity for quantum information processing.

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    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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    Area of Science:

    • Quantum Information Science
    • Quantum Optics
    • Photonics

    Background:

    • Hyper-entanglement utilizes multiple photonic degrees of freedom (DOF) to enhance quantum protocols.
    • Each DOF can be optimized for specific tasks, improving efficiency and capacity.

    Purpose of the Study:

    • To demonstrate the generation of photon pairs hyper-entangled between pulse modes and frequency bins.
    • To characterize and verify the generated hyper-entangled state.

    Main Methods:

    • Photon pairs were generated via spontaneous parametric downconversion in a domain-engineered crystal.
    • Pulse modes were subsequently entangled to two frequency bins using a spectral mapping technique.
    • The hyper-entangled state was verified through joint spectral intensity and two-photon interference measurements.

    Main Results:

    • Successful generation of photon pairs hyper-entangled in pulse modes and frequency bins.
    • Characterization confirmed the spectral phase and non-classical interference patterns.
    • The protocol integrates robust energy-time DOF with enhanced channel capacity.

    Conclusions:

    • This work presents a novel method for generating hyper-entangled photons.
    • The demonstrated technique combines the benefits of energy-time DOF with hyper-entanglement for advanced quantum applications.
    • This approach is compatible with existing fiber-optic networks, paving the way for practical quantum information and computation.