Optical superlattice for engineering Hubbard couplings in quantum simulation

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Chalopin, Thomas and Bojović, Petar and Bourgund, Dominik and Wang, Si and Franz, Titus and Bloch, Immanuel and Hilker, Timon (2025) Optical superlattice for engineering Hubbard couplings in quantum simulation. Physical Review Letters, 134 (5). 053402. ISSN 1079-7114 (https://doi.org/10.1103/PhysRevLett.134.053402)

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Abstract

Quantum simulations of Hubbard models with ultracold atoms rely on the exceptional control of coherent motion provided by optical lattices. Here we demonstrate enhanced tunability using an optical superlattice in a fermionic quantum gas microscope, evidenced by long-lived coherent double-well oscillations, next-nearest-neighbor quantum walks in a staggered configuration, and correlated quantum walks of two particles initiated through a resonant pair-breaking mechanism. We furthermore demonstrate tunable spin couplings through local offsets and engineer a spin ladder with ferromagnetic and antiferromagnetic couplings along the rungs and legs, respectively. Our Letter underscores the high potential of optical superlattices for engineering, simulating, and detecting strongly correlated many-body quantum states, with direct applications ranging from the study of mixed-dimensional systems to fermionic quantum computing.

ORCID iDs

Chalopin, Thomas, Bojović, Petar, Bourgund, Dominik, Wang, Si, Franz, Titus, Bloch, Immanuel and Hilker, Timon ORCID logoORCID: https://orcid.org/0000-0002-1012-5750;
  • Item type:Article
    ID code:92179
    Dates:
    Date
    Event
    6 February 2025
    Published
    10 December 2024
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:25 Feb 2025 14:36
    Last modified:03 Mar 2025 17:12
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/92179
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