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Showing 1–9 of 9 results
Advanced filters: Author: Jochen Braumüller Clear advanced filters

  • An analog quantum simulation scheme has been explored with a quantum hardware based on a superconducting circuit. Here the authors investigate the time evolution of the quantum Rabi model at ultra-strong coupling conditions, which is synthesized by slowing down the system dynamics in an effective frame.

    • Jochen Braumüller
    • Michael Marthaler
    • Alexey V. Ustinov
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-8

  • Engineering qubits with long coherence times requires the ability to distinguish multiple noise sources, which is not possible with typical two-level qubit sensors. Here the authors utilize the multiple level transitions of a superconducting qubit to characterize two common types of external noise.

    • Youngkyu Sung
    • Antti Vepsäläinen
    • William D. Oliver
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-9

  • The complexity of many-body quantum states makes their evolution difficult to simulate with classical computers. Experiments on a 2D nine-qubit device demonstrate that the key properties of quantum lattices can be accessed by measuring out-of-time-ordered correlators.

    • Jochen Braumüller
    • Amir H. Karamlou
    • William D. Oliver
    Research
    Nature Physics
    Volume: 18, P: 172-178

  • The presence of various noises in the qubit environment is a major limitation on qubit coherence time. Here, the authors demonstrate the use a closed-loop feedback to stabilize frequency noise in a flux-tunable superconducting qubit and suggest this as a scalable approach applicable to other types of noise.

    • Antti Vepsäläinen
    • Roni Winik
    • William D. Oliver
    ResearchOpen Access
    Nature Communications
    Volume: 13, P: 1-7

  • Superconducting giant atoms are realized in a waveguide by coupling small atoms to the waveguide at multiple discrete locations, producing tunable atom–waveguide coupling and enabling decoherence-free interactions.

    • Bharath Kannan
    • Max J. Ruckriegel
    • William D. Oliver
    Research
    Nature
    Volume: 583, P: 775-779