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Related Experiment Video

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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
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Optomechanical cooling with intracavity squeezed light.

Muhammad Asjad, Najmeh Etehadi Abari, Stefano Zippilli

    Optics Express
    |November 6, 2019
    PubMed
    Summary

    We show that using a degenerate optical parametric amplifier enhances optomechanical cooling efficiency by suppressing Stokes scattering. This method improves cooling performance, even outside the resolved sideband regime.

    Area of Science:

    • Quantum Optics
    • Optomechanics
    • Cavity Quantum Electrodynamics

    Background:

    • Optomechanical cooling is crucial for reducing mechanical resonator vibrations.
    • Optical parametric amplifiers can generate squeezed light, which has potential applications in quantum technologies.
    • Stokes scattering is a process that can hinder cooling efficiency in optomechanical systems.

    Purpose of the Study:

    • To investigate the performance of optomechanical cooling with a degenerate optical parametric amplifier (DOPA).
    • To demonstrate enhanced cooling efficiency through coherent suppression of Stokes scattering.
    • To compare this cooling scheme with methods using injected squeezed light.

    Main Methods:

    • Utilizing a degenerate optical parametric amplifier within an optomechanical cavity.

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  • Squeezing the cavity light using the DOPA.
  • Analyzing the optomechanical cooling performance by measuring resonator temperature or motional state.

    • Main Results:

    • Significant enhancement of optomechanical cooling efficiency was achieved.
    • Coherent suppression of Stokes scattering was identified as the mechanism for enhanced cooling.
    • Effective cooling was demonstrated even far from the resolved sideband regime.
    • The DOPA-based scheme proved more efficient than injecting pre-squeezed light.

    Conclusions:

    • Degenerate optical parametric amplifiers offer a powerful method for enhancing optomechanical cooling.
    • This technique provides a robust cooling solution, effective beyond the resolved sideband limit.
    • The DOPA approach presents a more efficient alternative to conventional squeezed light injection methods for optomechanical cooling.