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Improving few-photon optomechanical effects with coherent feedback.

Yue Wei, Xiaojuan Wang, Biao Xiong

    Optics Express
    |November 23, 2021
    PubMed
    Summary
    This summary is machine-generated.

    This study theoretically enhances few-photon effects in optomechanics using coherent feedback. The research demonstrates improved photon blockade and tunneling, potentially simplifying single-photon source realization and boosting quantum technology applications.

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    Area of Science:

    • Quantum Optics and Optomechanics
    • Quantum Information Science

    Background:

    • Few-photon effects like photon blockade and tunneling are crucial for quantum technology.
    • Optomechanical systems offer a platform for studying and utilizing these effects.

    Purpose of the Study:

    • To theoretically enhance few-photon effects in an optomechanical system.
    • To investigate the impact of a coherent feedback loop on photon blockade and tunneling.
    • To explore the application of feedback in generating Schrödinger-cat states.

    Main Methods:

    • Theoretical modeling of an optomechanical system with a coherent feedback loop.
    • Analysis of the second-order correlation function to quantify photon blockade.
    • Analysis of the third-order correlation function to assess photon tunneling.
    • Investigation of Schrödinger-cat state generation fidelity with feedback.

    Main Results:

    • Coherent feedback significantly improves the photon blockade effect.
    • Photon blockade is achievable even when cavity decay exceeds optomechanical coupling.
    • Feedback enhances the photon tunneling effect in the optomechanical system.
    • The fidelity of Schrödinger-cat state generation is improved by the feedback loop.

    Conclusions:

    • Introducing a coherent feedback loop is an effective strategy to enhance few-photon effects in optomechanics.
    • The findings suggest a pathway to more feasible experimental realization of single-photon sources.
    • Feedback-enhanced optomechanical systems show promise for advanced quantum information processing tasks, including cat state generation.