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Nonlinear squeezing generation via multimode PDC and single photon measurement.

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    We demonstrate simultaneous nonlinear squeezing in two light modes using photon-added coherent states. This technique enhances non-Gaussianity for quantum computing applications.

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    Area of Science:

    • Quantum optics
    • Quantum information science

    Background:

    • Nonlinear squeezing is crucial for continuous variable quantum computing.
    • Non-Gaussian states of light are key to advanced quantum technologies.

    Purpose of the Study:

    • To investigate the generation of nonlinear squeezing in multimode systems.
    • To explore simultaneous nonlinear squeezing in two modes.

    Main Methods:

    • Utilizing the photon-added coherent state technique.
    • Analyzing the impact of weak non-Gaussianity from single-photon addition.
    • Investigating dependence on modal structure, seed, and local oscillator profiles.

    Main Results:

    • Achieved simultaneous nonlinear squeezing in two modes.
    • Identified a regime where weak non-Gaussianity induces this effect.
    • Characterized nonlinear squeezing properties based on light structure and profiles.

    Conclusions:

    • Photon-added coherent states offer a viable route to generating nonlinear squeezing.
    • Simultaneous squeezing in multiple modes is achievable even with weak non-Gaussianity.
    • Optimal measurement strategies can enhance the utility of nonlinear squeezing.