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Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
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The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
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Topologically protected chainwise microwave-to-optical photon conversion interfaced by nitrogen-vacancy center

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    We developed a new method for quantum state transfer using a hybrid system and topological properties. This approach enables efficient microwave-to-optical photon conversion, crucial for quantum communication.

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    Area of Science:

    • Quantum physics
    • Condensed matter physics
    • Quantum information science

    Background:

    • The Su-Schrieffer-Heeger (SSH) model offers topologically protected edge states for robust quantum state transfer (QST).
    • Hybrid quantum systems combine advantageous features from different physical platforms.
    • Efficient quantum interfaces are vital for quantum communication and computing.

    Purpose of the Study:

    • To propose a topological quantum state transfer protocol for microwave (MW)-to-optical photon conversion.
    • To utilize a synthesized SSH chain within a hybrid quantum system.
    • To enhance the efficiency and scalability of MW-to-optical photon conversion.

    Main Methods:

    • Constructing a topological SSH chain by coupling superconducting resonators with optical cavities via nitrogen-vacancy center ensembles.
    • Employing power-law coupling engineering to reduce the adiabatic evolution duration.
    • Implementing a hybrid system integrating superconducting and optical components.

    Main Results:

    • Demonstrated a high-efficiency MW-to-optical photon conversion protocol.
    • Achieved improved scalability of the transducer concerning system size and photon number.
    • Shortened the adiabatic evolution time threshold through coupling engineering.

    Conclusions:

    • The proposed topological protocol facilitates efficient quantum interfaces between MW quantum circuits and optical networks.
    • This advancement is essential for long-distance quantum communication and distributed quantum computing.
    • The hybrid system approach offers a promising route for scalable quantum transduction.