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Nonclassical Mueller polarimetry.

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    This study introduces a nonlocal Mueller polarimetry technique using quantum correlations. The novel method achieves results equivalent to classical approaches and shows resilience to imperfections, offering a feasible alternative.

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    Area of Science:

    • Quantum optics
    • Quantum information science
    • Polarimetry

    Background:

    • Quantum correlations, including nonlocality, are key non-classical features with technological potential.
    • Classical Mueller polarimetry characterizes sample polarization properties via light measurement.
    • Nonlocality can alter classical measurement causality.

    Purpose of the Study:

    • To investigate a nonlocal approach to Mueller polarimetry.
    • To explore the potential of quantum correlations in optical measurements.
    • To assess the feasibility and limitations of the nonlocal technique.

    Main Methods:

    • Developed a nonlocal Mueller polarimetry technique utilizing polarization-entangled photons.
    • Split the measurement into polarization projections on entangled photons, linked by quantum correlations.
    • Post-selected measurements to obtain the Mueller matrix.

    Main Results:

    • Achieved results equivalent to classical Mueller polarimetry for known and unknown samples.
    • Demonstrated that the nonlocal feature can invert the classical preparation and measurement causal order.
    • Quantified limitations related to non-ideal entangled states.

    Conclusions:

    • The nonlocal Mueller polarimetry technique is highly resilient to imperfections in the quantum state.
    • This quantum-enhanced method presents a feasible alternative to classical polarimetry.
    • The study highlights the practical application of quantum correlations in optical metrology.