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    Researchers propose a novel chip-integrated Sagnac interferometer to experimentally test quantum mechanics and general relativity. This device uses rotation to induce proper time differences, causing observable decoherence in single photons.

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    Area of Science:

    • Fundamental Physics
    • Quantum Mechanics
    • General Relativity

    Background:

    • Theories of quantum mechanics and general relativity remain largely separate.
    • Experimental tests connecting these theories are scarce.
    • Relativistic proper time may induce decoherence in quantum systems.

    Purpose of the Study:

    • To propose and design a chip-integrated Sagnac interferometer.
    • To experimentally probe the interplay between quantum coherence and relativistic proper time.
    • To provide a testable overlap between quantum mechanics and general relativity.

    Main Methods:

    • Utilizing a chip-integrated Sagnac interferometer with single-photon paths.
    • Inducing a proper time difference via mechanical rotation.
    • Observing the decrease in interference visibility due to decoherence.

    Main Results:

    • Theoretically derived the proper time difference from the Sagnac effect.
    • Estimated decoherence for single-photon wavepackets with 10 fs coherence time at 1000 rad/s rotation.
    • Presented a practical chip design for high-speed rotation and all-optical readout.

    Conclusions:

    • The proposed platform enables experimental probing of relativistic effects on quantum coherence.
    • Rotation speed acts as a tunable parameter to control decoherence.
    • This scalable, compact approach opens new avenues in fundamental physics research.