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Systematic evaluation of an atomic clock at 2 × 10−18 total uncertainty

Author

Listed:
  • T.L. Nicholson

    (JILA, National Institute of Standards and Technology and University of Colorado
    University of Colorado)

  • S.L. Campbell

    (JILA, National Institute of Standards and Technology and University of Colorado
    University of Colorado)

  • R.B. Hutson

    (JILA, National Institute of Standards and Technology and University of Colorado
    University of Colorado)

  • G.E. Marti

    (JILA, National Institute of Standards and Technology and University of Colorado
    University of Colorado)

  • B.J. Bloom

    (JILA, National Institute of Standards and Technology and University of Colorado
    University of Colorado
    Present address: Intel, Hillsboro, OR, USA)

  • R.L. McNally

    (JILA, National Institute of Standards and Technology and University of Colorado
    University of Colorado)

  • W. Zhang

    (JILA, National Institute of Standards and Technology and University of Colorado
    University of Colorado)

  • M.D. Barrett

    (JILA, National Institute of Standards and Technology and University of Colorado
    Centre for Quantum Technologies)

  • M.S. Safronova

    (University of Delaware
    Joint Quantum Institute, NIST and the University of Maryland)

  • G.F. Strouse

    (National Institute of Standards and Technology)

  • W.L. Tew

    (National Institute of Standards and Technology)

  • J. Ye

    (JILA, National Institute of Standards and Technology and University of Colorado
    University of Colorado)

Abstract

The pursuit of better atomic clocks has advanced many research areas, providing better quantum state control, new insights in quantum science, tighter limits on fundamental constant variation and improved tests of relativity. The record for the best stability and accuracy is currently held by optical lattice clocks. Here we take an important step towards realizing the full potential of a many-particle clock with a state-of-the-art stable laser. Our 87Sr optical lattice clock now achieves fractional stability of 2.2 × 10−16 at 1 s. With this improved stability, we perform a new accuracy evaluation of our clock, reducing many systematic uncertainties that limited our previous measurements, such as those in the lattice ac Stark shift, the atoms’ thermal environment and the atomic response to room-temperature blackbody radiation. Our combined measurements have reduced the total uncertainty of the JILA Sr clock to 2.1 × 10−18 in fractional frequency units.

Suggested Citation

  • T.L. Nicholson & S.L. Campbell & R.B. Hutson & G.E. Marti & B.J. Bloom & R.L. McNally & W. Zhang & M.D. Barrett & M.S. Safronova & G.F. Strouse & W.L. Tew & J. Ye, 2015. "Systematic evaluation of an atomic clock at 2 × 10−18 total uncertainty," Nature Communications, Nature, vol. 6(1), pages 1-8, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7896
    DOI: 10.1038/ncomms7896
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    Cited by:

    1. Jongmin Lee & Roger Ding & Justin Christensen & Randy R. Rosenthal & Aaron Ison & Daniel P. Gillund & David Bossert & Kyle H. Fuerschbach & William Kindel & Patrick S. Finnegan & Joel R. Wendt & Micha, 2022. "A compact cold-atom interferometer with a high data-rate grating magneto-optical trap and a photonic-integrated-circuit-compatible laser system," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    2. Xiaochao Luo & Chuntao Li & Xingzhao Huang & Jintian Lin & Renhong Gao & Yifei Yao & Yingnuo Qiu & Yixuan Yang & Lei Wang & Huakang Yu & Ya Cheng, 2025. "Visible Brillouin-quadratic microlaser in a high-Q thin-film lithium niobate microdisk," Nature Communications, Nature, vol. 16(1), pages 1-8, December.

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