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Characterization and control of topologically protected charge-parity qubits: Part 1

ORAL

Abstract

Superconducting qubits with topological protection against local noise hold the promise of significantly enhanced coherence times and higher gate fidelities than is possible with conventional qubits. We are developing one such protected design — the hybrid charge-parity qubit — that combines arrays of compact, high inductances and conventional Josephson junctions with individual flux control for tuning each plaquette to a regime with a pi-periodic Josephson energy. With this scheme, concatenating multiple pi-periodic elements further enhances the degree of protection. Here, we will describe our experimental characterization of one- and two-plaquette devices through spectroscopy and time-domain measurements.

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Presenters

  • Kenneth Dodge

    Physics, Syracuse University, Syracuse University

Authors

  • Kenneth Dodge

    Physics, Syracuse University, Syracuse University

  • Yebin Liu

    Physics, Syracuse University, Syracuse University

  • Michael Senatore

    Physics, Syracuse University, Syracuse University

  • FNU Naveen

    University of Wisconsin - Madison, Physics, University of Wiconsin - Madison

  • Shaojiang Zhu

    University of Wisconsin - Madison, Physics, University of Wiconsin - Madison

  • Abigail J Shearrow

    University of Wisconsin - Madison, Physics, University of Wiconsin - Madison

  • Andrey Klots

    University of Wisconsin - Madison, Physics, University of Wiconsin - Madison

  • Lara Faoro

    University of Wisconsin - Madison, Physics, University of Wiconsin - Madison

  • Lev B Ioffe

    Google.; University of Wisconsin - Madison, University of Wisconsin - Madison, Physics, University of Wiconsin - Madison, University of Wisconsin

  • Robert F McDermott

    University of Wisconsin - Madison, Department of Physics, University of Wisconsin-Madison, Madison WI, USA, Physics, University of Wiconsin - Madison

  • Britton L Plourde

    Syracuse University, Physics, Syracuse University