Fluxonium qubit limited by a collection of two-level systems

ORAL

Abstract

By running a quantum Szilard engine we actively heat or cool a two-level-system (TLS) environment [1]. The egnine consists of a granular aluminum fluxonium qubit [2] coupled on one side to the TLS environment and on the other side to a real-time measurement and control apparatus. We show that the TLSs and the qubit are each other's dominant loss mechanism, therefore their understanding and mitigation is not only crucial to improve qubit lifetimes but also to avoid non-Markovian qubit dynamics. We also show that a single pi-pulse on the qubit gives rise to measureable heating in the TLS environment, which complicates the task of superconducting qubit benchmarking.

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Publication: [1] Spiecker et al., arXiv:2204.00499 (2022)
[2] Grünhaupt and Spiecker et al., Nat. Mater. 18, 816–819 (2019)

Presenters

  • Martin Spiecker

    • PHI, Karlsruhe Institute of Technology, Germany
    • IQMT and PHI, Karlsruhe Institute of Technology (KIT), Germany
    • Karlsruhe Institute of Technology (KIT)
    • IQMT and PHI, Karlsruhe Institute of Technology (KIT)
    • IQMT and PHI, Karlsruhe Institute of Technology

Authors

  • Martin Spiecker

    • PHI, Karlsruhe Institute of Technology, Germany
    • IQMT and PHI, Karlsruhe Institute of Technology (KIT), Germany
    • Karlsruhe Institute of Technology (KIT)
    • IQMT and PHI, Karlsruhe Institute of Technology (KIT)
    • IQMT and PHI, Karlsruhe Institute of Technology

  • Patrick Paluch

    • IQMT and PHI, Karlsruhe Institute of Technology, Germany
    • IQMT and PHI, Karlsruhe Institute of Technology (KIT)
    • IQMT and PHI, Karlsruhe Institute of Technology (KIT), Germany
    • Karlsruhe Institute of Technology (KIT)

  • Niv Drucker

    • Quantum Machines

  • Shlomi Matityahu

    • Karlsruhe Institute of Technology (KIT)

  • Daria Gusenkova

    • Karlsruhe Institute of Technology (KIT)

  • Francesco Valenti

    • Karlsruhe Institute of Technology (KIT)
    • IQMT and PHI, Karlsruhe Institute of Technology, Germany

  • Patrick Winkel

    • PHI, Karlsruhe Institute of Technology, Germany
    • Karlsruhe Institute of Technology (KIT)
    • Karlsruhe Institute of Technology

  • Dennis Rieger

    • PHI, Karlsruhe Institute of Technology, Germany
    • IQMT and PHI, Karlsruhe Institute of Technology (KIT), Germany
    • Karlsruhe Institute of Technology (KIT)
    • Karlsruhe Institute of Technology
    • PHI, Karlsruhe Institute of Technology

  • Nicolas Gosling

    • IQMT, Karlsruhe Institute of Technology, Germany
    • IQMT and PHI, Karlsruhe Institute of Technology (KIT), Germany
    • Karlsruhe Institute of Technology (KIT)
    • IQMT and PHI, Karlsruhe Institute of Technology, Germany

  • Simon Günzler

    • PHI, Karlsruhe Institute of Technology, Germany
    • IQMT and PHI, Karlsruhe Institute of Technology (KIT), Germany
    • Karlsruhe Institute of Technology (KIT)
    • IQMT and PHI, Karlsruhe Institute of Technology
    • Karlsruhe Institute of Technology

  • Ivan Takmakov

    • Karlsruhe Institute of Technology (KIT)
    • Karlsruhe Institute of Technology

  • Richard Gebauer

    • Karlsruhe Institute of Technology (KIT)
    • IPE, Karlsruhe Institute of Technology, Germany

  • Oliver Sander

    • Karlsruhe Institute of Technology (KIT)
    • IPE, Karlsruhe Institute of Technology, Germany

  • Gianluigi Catelani

    • Forschungszentrum Jülich GmbH
    • Forschungszentrum Jülich

  • Alexander Shnirman

    • Karlsruhe Institute of Technology (KIT)

  • Alexey V Ustinov

    • Karlsruhe Institute of Technology
    • Karlsruhe Institute of Technology (KIT)

  • Wolfgang Wernsdorfer

    • IQMT and PHI, Karlsruhe Institute of Technology, Germany
    • IQMT and PHI, Karlsruhe Institute of Technology (KIT)
    • IQMT and PHI, Karlsruhe Institute of Technology (KIT), Germany
    • Karlsruhe Institute of Technology (KIT)
    • IQMT and PHI, Karlsruhe Institute of Technology
    • Karlsruhe Institute of Technology

  • Yonatan Cohen

    • Quantum Machines

  • Ioan M Pop

    • IQMT and PHI, Karlsruhe Institute of Technology, Germany
    • IQMT and PHI, Karlsruhe Institute of Technology (KIT)
    • IQMT and PHI, Karlsruhe Institute of Technology (KIT), Germany
    • Karlsruhe Institute of Technology (KIT)
    • IQMT and PHI, Karlsruhe Institute of Technology
    • Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany