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

ORAL

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.

*Funding for this work is provided primarily by DOE Center of Quantum System Accelerator, and also by V. Bush Fellowship, NSF QLCI OMA-2016244, NSF JILA-PFC PHY-2317149, and NIST. S. L. acknowledges funding from the Alexander von Humboldt Foundation and B. L. from the Lindemann Trust.

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Publication: arXiv:2501.09343

Presenters

  • Lingfeng Yan

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

Authors

  • Lingfeng Yan

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

  • Stefan Lannig

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

  • Max Nicolas Frankel

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

  • William R Milner

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

  • Ben Lewis

    • JILA
    • JILA/CU Boulder

  • Dahyeon Lee

    • JILA
    • JILA/CU Boulder

  • Kyungtae Kim

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

  • Jun Ye

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