Toward low-entropy states in the Fermi-Hubbard model with quantum gas microscopy

ORAL

Abstract

Ultracold atoms in optical lattices are a powerful platform for studying strongly correlated quantum systems. We study the repulsive Fermi-Hubbard model through quantum gas microscopy with fermionic Lithium-6 atoms in a square lattice. This technique allows for single-site resolved readout and manipulation, and has enabled us to achieve long-range antiferromagnetic order across our entire sample by performing entropy redistribution. Accessing intriguing phases in the Fermi-Hubbard model, requires development of new techniques for low-entropy quantum state preparation. Here we report on our low-noise interfering optical lattice, which offers dynamically tunable lattice geometry and allows for studies of the Fermi-Hubbard model in dimerized, honeycomb, and triangular lattices. This tunability can alternatively facilitate an adiabatic ramp from an ultra-low entropy initial state, prepared through entropy redistribution, toward strongly-correlated quantum phases. Another possible application of this interfering lattice is to provide simultaneous readout of both spin species.

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Presenters

  • Muqing Xu

    Harvard University, Physics Department, Harvard University

Authors

  • Muqing Xu

    Harvard University, Physics Department, Harvard University

  • Christie S Chiu

    Harvard University, Physics Department, Harvard University

  • Geoffrey Ji

    Harvard University, Physics Department, Harvard University

  • Justus Brüggenjürgen

    Harvard University and University of Hamburg, University of Hamburg and Harvard University

  • Anton Mazurenko

    Harvard University

  • Maxwell F Parsons

    Harvard University

  • Marton Kanasz-Nagy

    Harvard University

  • Richard Schmidt

    Harvard University

  • Fabian Grusdt

    Physics Department, Technical University of Munich, Department of Physics and Institute for Advanced Study, Technical University of Munich, 85748 Garching, Harvard University, Technical University of Munich

  • Eugene Demler

    Physics Department, Harvard University, Harvard University

  • Daniel Greif

    Harvard University, Physics Department, Harvard University

  • Markus Greiner

    Harvard University, Physics Department, Harvard University