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A High-power Spectrally Tailored Laser for High-Fidelity Quantum State Engineering in a Three-Dimensional Optical Lattice Clock

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Abstract

High-fidelity quantum state control of optical qubits is crucial for quantum information science, quantum metrology, and precision interferometry. In this talk, we will present our development of a spectrally tailored laser to realize high-fidelity quantum state control when driving the optical clock transition of 87Sr. The system leverages dual optical reference cavities—a cryogenic silicon and a room-temperature ULE—to achieve exceptional noise reduction across a broad Fourier frequency range. The frequency noise of this laser is independently verified by an atom-based spectrum analyzer utilizing an innovative pulse sequence that realizes tunable frequency sensitivity while suppressing systematic errors from laser intensity noise. We demonstrate an average single-qubit Clifford gate fidelity up to F2​=0.99964(3) while simultaneously driving 3,000 optical qubits in a three-dimensional optical lattice, measured by randomized benchmarking.

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Publication: arXiv:2501.09343

Presenters

  • Lingfeng Yan

    JILA, National Institute of Standards and Technology and University of Colorado and Department of Physics, University of Colorado, Boulder, JILA

Authors

  • Lingfeng Yan

    JILA, National Institute of Standards and Technology and University of Colorado and Department of Physics, University of Colorado, Boulder, JILA

  • Stefan Lannig

    JILA, National Institute of Standards and Technology and University of Colorado and Department of Physics, University of Colorado, Boulder, JILA

  • Max Nicolas Frankel

    JILA, National Institute of Standards and Technology and University of Colorado and Department of Physics, University of Colorado, Boulder, University of Colorado, Boulder

  • William R Milner

    JILA, National Institute of Standards and Technology and University of Colorado and Department of Physics, University of Colorado, Boulder, JILA

  • Ben Lewis

    JILA/CU Boulder, JILA

  • Dahyeon Lee

    JILA/CU Boulder, JILA

  • Kyungtae Kim

    JILA, National Institute of Standards and Technology and University of Colorado and Department of Physics, University of Colorado, Boulder, JILA

  • Jun Ye

    JILA, National Institute of Standards and Technology and University of Colorado and Department of Physics, University of Colorado, Boulder, University of Colorado, Boulder