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    Area of Science:

    • Quantum Information Science
    • Photonics
    • Quantum Optics

    Background:

    • Phase manipulation is crucial for quantum information processing.
    • Orbital angular momentum (OAM) of photons offers a high-dimensional resource for quantum applications.
    • Existing methods using Dove prisms (DP) can introduce errors in spin-OAM hybrid states due to polarization changes and mode-dependent global phases.

    Purpose of the Study:

    • To implement a high-dimensional controlled-phase manipulation module (PMM).
    • To compensate for mode-dependent global phases introduced by elements like Dove prisms.
    • To preserve phase information in spin-OAM hybrid superposition states for enhanced quantum processing.

    Main Methods:

    • Implementation of a novel phase manipulation module (PMM).
    • Utilizing a Sagnac interferometer-based structure.
    • Development of techniques to compensate for mode-dependent global phase shifts.

    Main Results:

    • The PMM successfully compensates for mode-dependent global phases.
    • Phase information in spin-OAM hybrid superposition states is preserved.
    • The developed PMM demonstrates stability and suitability for high-dimensional controlled-phase gates.

    Conclusions:

    • The PMM enables accurate phase manipulation for spin-OAM hybrid states, crucial for quantum information processing.
    • The module's stability and phase preservation capabilities enhance its utility for quantum gates.
    • The Sagnac-based PMM is also applicable to classical communication using spin-OAM hybrid light fields.