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Enhancing the force sensitivity of a squeezed light optomechanical interferometer.

Sreeshna Subhash, Sanket Das, Tarak Nath Dey

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    |January 6, 2023
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    Summary
    This summary is machine-generated.

    This study enhances force sensitivity in optomechanical interferometers using squeezed light and a quantum back-action nullifying meter. The method surpasses the standard quantum limit, offering improved precision for sensitive measurements.

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    Area of Science:

    • Quantum optics
    • Optomechanics
    • Precision measurement

    Background:

    • Optomechanical interferometers are crucial for precision measurements.
    • Standard quantum limit restricts achievable force sensitivity.
    • Squeezed vacuum states offer a route to surpass this limit.

    Purpose of the Study:

    • To investigate enhanced force sensitivity in optomechanical systems.
    • To explore the combined effect of squeezed light and quantum back-action nullification.
    • To analyze sensitivity enhancement beyond the standard quantum limit.

    Main Methods:

    • Utilizing frequency-dependent squeezed vacuum.
    • Implementing a quantum back-action nullifying meter.
    • Configuring an optomechanical cavity with a central mechanical mirror.

    Main Results:

    • Achieved sensitivity enhancement beyond the standard quantum limit by a factor of e-reff.
    • Derived an effective squeezing parameter reff = r + ln(4Δ/ζ)/2.
    • Investigated sensitivity dependence on temperature, mirror reflectivity, and laser power.

    Conclusions:

    • The combined technique significantly enhances force sensitivity in optomechanical interferometers.
    • The derived formula quantifies the achievable sensitivity improvement.
    • The method is effective for frequencies below the mechanical mirror's resonance frequency.