Understanding drive-induced state transitions in fluxonium: part 2/2

ORAL

Abstract

Fluxonium is a promising qubit platform with long coherence times. For reaching high fidelity, fast, and scalable two-qubit gates or for using them as couplers between other systems, these non-linear devices often need to be strongly driven over a selection of frequencies. It is therefore crucial to understand the impact on the qubit computational subspace by such a drive at various frequencies, not only near the resonator frequency as discussed in the last part of the talk.

In this presentation, we experimentally study the effects of strong drives on fluxonium qubits. We use Floquet calculations and multilevel branch analysis to model and understand the observed features. In part 2 of this two-part talk, we will focus on undesired state transitions during strong drives at frequencies away from the resonator frequency.

*This work was supported by the Army Research Office under Grant No. W911NF2310101. Part of this work was performed at nano@stanford RRID:SCR_026695. Some devices used in this work were fabricated and packaged by the Superconducting Qubits at Lincoln Laboratory (SQUILL) Foundry at MIT Lincoln Laboratory, with funding from the Laboratory for Physical Sciences (LPS) Qubit Collaboratory.

–

Presenters

  • Chuyao Tong

    • Stanford University

Authors

  • Chuyao Tong

    • Stanford University

  • Paul R Varosy

    • Stanford University / SLAC National Accelerator Laboratory

  • Chunyang Ding

    • Stanford University

  • Nikitha Jain

    • Stanford University

  • Alex Arimoto Chapple

    • Universite de Sherbrooke

  • Boris Varbanov

    • University of Sherbrooke
    • Université de Sherbrooke
    • Universite de Sherbrooke

  • Alexander McDonald

    • Université de Sherbrooke
    • Universite de Sherbrooke

  • Sai Pavan Chitta

    • Northwestern University

  • Danyang Chen

    • Northwestern University

  • Tianpu Zhao

    • Northwestern University

  • Alexandre Blais

    • Université de Sherbrooke
    • University of Sherbrooke
    • Universite de Sherbrooke
    • Institut Quantique, Département de Physique, Université de Sherbrooke

  • Jens Koch

    • Northwestern University

  • David I Schuster

    • Stanford University / SLAC National Accelerator Laboratory
    • University of Chicago
    • Stanford