JILA SrI Optical Lattice Clock with Uncertainty of $2.0\times 10^{-18}$

Abstract

We report on an improved systematic evaluation of the JILA SrI optical lattice clock, achieving a nearly identical systematic uncertainty compared to the previous strontium accuracy record set by the JILA SrII optical lattice clock (OLC) at $2.1\times 10^{-18}$. This improves upon the previous evaluation of the JILA SrI optical lattice clock in 2013, and we achieve a more than twenty-fold reduction in systematic uncertainty to $2.0\times 10^{-18}$. A seven-fold improvement in clock stability, reaching $4.8\times 10^{-17}/\sqrt{\tau }$ for an averaging time $\tau$ in seconds, allows the clock to average to its systematic uncertainty in under 10 minutes. We improve the systematic uncertainty budget in several important ways. This includes a novel scheme for taming blackbody radiation-induced frequency shifts through active stabilization and characterization of the thermal environment, inclusion of higher-order terms in the lattice light shift, and updated atomic coefficients. Along with careful control of other systematic effects, we achieve low temporal drift of systematic offsets and high uptime of the clock. We additionally present an improved evaluation of the second order Zeeman coefficient that is applicable to all Sr optical lattice clocks. These improvements in performance have enabled several important studies including frequency ratio measurements through the Boulder Area Clock Optical Network (BACON), a high precision comparison with the JILA 3D lattice clock, a demonstration of a new all-optical time scale combining SrI and a cryogenic silicon cavity, and a high sensitivity search for ultralight scalar dark matter.

arXiv comment24 pages, 9 figures

References in corpus (31)

• Search for New Physics with Atoms and Molecules
• An Optical Lattice Clock with Accuracy and Stability at the $10^{-18}$ Level
• Systematic evaluation of an atomic clock at 2e-18 total uncertainty
• Atomic clock performance beyond the geodetic limit
• An ${}^{27}$Al${}^{+}$ quantum-logic clock with systematic uncertainty below $10^{-18}$
• 1.5 $\mu$m lasers with sub 10 mHz linewidth
• Hunting for topological dark matter with atomic clocks
• Optical clock intercomparison with $6\times 10^{-19}$ precision in one hour
• A Fermi-degenerate three-dimensional optical lattice clock
• Spectroscopic observation of SU(N)-symmetric interactions in Sr orbital magnetism
• New Limits on Coupling of Fundamental Constants to Gravity Using ${}^{87}$Sr Optical Lattice Clocks
• Optical clock comparison test of Lorentz symmetry
• A quantum many-body spin system in an optical lattice clock
• Rabi Spectroscopy and Excitation Inhomogeneity in a 1D Optical Lattice Clock
• Synchronization of Distant Optical Clocks at the Femtosecond Level
• The absolute frequency of the 87Sr optical clock transition
• High accuracy correction of blackbody radiation shift in an optical lattice clock
• Blackbody radiation shift in the Sr optical atomic clock
• Search for domain wall dark matter with atomic clocks on board global positioning system satellites
• Lattice Induced Frequency Shifts in Sr Optical Lattice Clocks at the $10^{-17}$ Level
• Realization of a time-scale with an accurate optical lattice clock
• An atomic clock with $1\times 10^{-18}$ room-temperature blackbody Stark uncertainty
• The 87-Sr optical frequency standard at PTB
• Operational Magic Intensity for Sr Optical Lattice Clocks
• Hyperpolarizability and operational magic wavelength in an optical lattice clock
• Optical to microwave clock frequency ratios with a nearly continuous strontium optical lattice clock
• Demonstration of a time scale based on a stable optical carrier
• Lifetime measurement of the ^3P_2 metastable state of strontium atoms
• Delivering pulsed and phase stable light to atoms of an optical clock
• Modeling light shifts in optical lattice clocks
• Multipolar polarizabilities and hyperpolarizabilities in the Sr optical lattice clock

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