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High-fidelity imaging of a band insulator in a three-dimensional optical lattice clock

William R. Milner*, Lingfeng Yan, Ross B. Hutson, Christian Sanner, and Jun Ye†

  • JILA, NIST and University of Colorado, 440 UCB, Boulder, Colorado 80309, USA

  • *william.milner@colorado.edu
  • †ye@jila.colorado.edu
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Phys. Rev. A 107, 063313 – Published 26 June, 2023

DOI: https://doi.org/10.1103/PhysRevA.107.063313

Abstract

We report on the observation of a high-density, band insulating state in a three-dimensional optical lattice clock. Filled with a nuclear-spin-polarized degenerate Fermi gas of Sr87, the three-dimensional (3D) lattice has one atom per site in the ground motional state, thus guarding against frequency shifts due to contact interactions. At this high density where the average distance between atoms is comparable to the probe wavelength, conventional imaging techniques at saturation intensity suffer from large systematic errors. To spatially probe frequency shifts in the clock and measure thermodynamic properties of this system, accurate imaging techniques at high optical depths are required. Using a combination of highly saturated fluorescence and absorption imaging, we confirm the density distribution in our 3D optical lattice in agreement with a single spin band insulating state. Combining our clock platform with this high filling fraction opens the door to studying new classes of long-lived, many-body states arising from dipolar interactions.

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Outline

Information

Phys. Rev. A 107, 063313– Published 26 June, 2023
  • Received 9 January 2023
  • Revised 9 March 2023
  • Accepted 31 May 2023
Article part of CHORUS
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