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A Fermi-degenerate three-dimensional optical lattice clock

Strontium optical lattice clocks have the potential to simultaneously interrogate millions of atoms with a high spectroscopic quality factor of 4 x 1017. Previously, atomic interactions have forced a compromise between clock stability, which benefits from a large number of atoms, and accuracy, which suffers from density-dependent frequency shifts. Here we demonstrate a scalable solution that takes advantage of the high, correlated density of a degenerate Fermi gas in a three-dimensional (3D) optical lattice to guard against on-site interaction shifts. We show that contact interactions are resolved so that their contribution to clock shifts is orders of magnitude lower than in previous experiments. A synchronous clock comparison between two regions of the 3D lattice yields a measurement precision of 5 x 10–19 in 1 hour of averaging time.

Authors:   S. L. Campbell; R. B. Hutson; G. E. Marti; A. Goban; N. Darkwah Oppong; R. L. McNally; L. Sonderhouse; J. M. Robinson; W. Zhang; B. J. Bloom; J. Ye
Journal:   Science
Volume:   358
edition:   6359
Year:   2017
Pages:   90
DOI:   10.1126/science.aam5538
Publication date:   06-Oct-2017
Facts, background information, dossiers
  • solution
  • interactions
  • gas
  • atoms
  • atomic interactions
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