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Realizing topological edge states with Rydberg-atom synthetic dimensions

Author

Listed:
  • S. K. Kanungo

    (Rice University
    Rice University)

  • J. D. Whalen

    (Rice University
    Rice University)

  • Y. Lu

    (Rice University
    Rice University)

  • M. Yuan

    (Rice University
    Rice University
    University of Science and Technology of China
    University of Chicago)

  • S. Dasgupta

    (Rice University
    Rice University)

  • F. B. Dunning

    (Rice University)

  • K. R. A. Hazzard

    (Rice University
    Rice University)

  • T. C. Killian

    (Rice University
    Rice University)

Abstract

A discrete degree of freedom can be engineered to match the Hamiltonian of particles moving in a real-space lattice potential. Such synthetic dimensions are powerful tools for quantum simulation because of the control they offer and the ability to create configurations difficult to access in real space. Here, in an ultracold 84Sr atom, we demonstrate a synthetic-dimension based on Rydberg levels coupled with millimeter waves. Tunneling amplitudes between synthetic lattice sites and on-site potentials are set by the millimeter-wave amplitudes and detunings respectively. Alternating weak and strong tunneling in a one-dimensional configuration realizes the single-particle Su-Schrieffer-Heeger (SSH) Hamiltonian, a paradigmatic model of topological matter. Band structure is probed through optical excitation from the ground state to Rydberg levels, revealing symmetry-protected topological edge states at zero energy. Edge-state energies are robust to perturbations of tunneling-rates that preserve chiral symmetry, but can be shifted by the introduction of on-site potentials.

Suggested Citation

  • S. K. Kanungo & J. D. Whalen & Y. Lu & M. Yuan & S. Dasgupta & F. B. Dunning & K. R. A. Hazzard & T. C. Killian, 2022. "Realizing topological edge states with Rydberg-atom synthetic dimensions," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-28550-y
    DOI: 10.1038/s41467-022-28550-y
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    References listed on IDEAS

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    1. Eric J. Meier & Fangzhao Alex An & Bryce Gadway, 2016. "Observation of the topological soliton state in the Su–Schrieffer–Heeger model," Nature Communications, Nature, vol. 7(1), pages 1-6, December.
    2. Fangzhao Alex An & Eric J. Meier & Bryce Gadway, 2017. "Diffusive and arrested transport of atoms under tailored disorder," Nature Communications, Nature, vol. 8(1), pages 1-6, December.
    3. S. Kolkowitz & S. L. Bromley & T. Bothwell & M. L. Wall & G. E. Marti & A. P. Koller & X. Zhang & A. M. Rey & J. Ye, 2017. "Spin–orbit-coupled fermions in an optical lattice clock," Nature, Nature, vol. 542(7639), pages 66-70, February.
    4. Sepehr Ebadi & Tout T. Wang & Harry Levine & Alexander Keesling & Giulia Semeghini & Ahmed Omran & Dolev Bluvstein & Rhine Samajdar & Hannes Pichler & Wen Wei Ho & Soonwon Choi & Subir Sachdev & Marku, 2021. "Quantum phases of matter on a 256-atom programmable quantum simulator," Nature, Nature, vol. 595(7866), pages 227-232, July.
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    1. Tao Chen & Chenxi Huang & Ivan Velkovsky & Kaden R. A. Hazzard & Jacob P. Covey & Bryce Gadway, 2024. "Strongly interacting Rydberg atoms in synthetic dimensions with a magnetic flux," Nature Communications, Nature, vol. 15(1), pages 1-8, December.

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