A Fermi-degenerate three-dimensional optical lattice clock

• Autores: S.L. Campbell, R.B. Hutson, G. E. Marti
• Localización: Science, ISSN 0036-8075, Vol. 358, Nº 6359, 2017, págs. 90-94
• Idioma: inglés
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• Resumen

  • Strontium optical lattice clocks have the potential to simultaneously interrogate millions of atoms with a high spectroscopic quality factor of 4 × 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 × 10–19 in 1 hour of averaging time.