Probing the extended Fermi-Hubbard Model with ultracold ytterbium

ORAL

Abstract

The Fermi-Hubbard Model (FHM) in condensed-matter physics describes the interplay between the kinetic energy and the on-site interaction of electrons in a lattice. Ultracold atoms in optical lattices have allowed to investigate this model with an unprecedented level of control and tunability. While the original focus has been on the FHM of spin 1/2 particles and SU(2) symmetry, extended Hubbard models, such as multi-band and SU(N>2)-symmetric models, can now increasingly be addressed both in experiment and theory. In our experiment, we implement Hamiltonians such as the SU(N)-FHM with tunable N≤6 with ultracold ytterbium. We prepare 173Yb atoms in a two-dimensional square optical lattice, and locally probe the FHM for variable symmetry and interactions, allowing for direct comparisons of different systems and benchmarking of theoretical models.

*We acknowledge support by the Max Planck Society (MPG), Deutsche Forschungsgemeinschaft via EXC-2111 – 390814868 and the State of Bavaria MQV grant.

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Presenters

  • Giulio Pasqualetti

    • Ludwig-Maximilians-Universität (LMU-Munich), Max-Planck Institut für Quantenoptik (MPQ), Munich Center for Quantum Science and Technology (MCQST)

Authors

  • Giulio Pasqualetti

    • Ludwig-Maximilians-Universität (LMU-Munich), Max-Planck Institut für Quantenoptik (MPQ), Munich Center for Quantum Science and Technology (MCQST)

  • Oscar Bettermann

    • Ludwig-Maximilians-Universität (LMU-Munich), Max-Planck Institut für Quantenoptik (MPQ), Munich Center for Quantum Science and Technology (MCQST)

  • Nelson Darkwah Oppong

    • Ludwig-Maximilians-Universität (LMU-Munich), Max-Planck Institut für Quantenoptik (MPQ), Munich Center for Quantum Science and Technology (MCQST)

  • Immanuel Bloch

    • Max Planck Institute for Quantum Optics
    • Ludwig-Maximilians-Universität (LMU-Munich), Max-Planck Institut für Quantenoptik (MPQ), Munich Center for Quantum Science and Technology (MCQST)
    • Max Planck Institute of Quantum Optics
    • Max Planck Institute of Quantum Optics, 85748 Garching, Germany and Fakultät für Physik, Ludwig-Maximilians-Universität, 80799 Munich, Germany

  • Simon Foelling

    • Ludwig-Maximilians-Universität (LMU-Munich), Max-Planck Institut für Quantenoptik (MPQ), Munich Center for Quantum Science and Technology (MCQST)