Implementation of π-periodic Josephson Elements for Topologically Protected Charge-Parity Qubits

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 high kinetic inductance nanowires and conventional Josephson junctions and involves the individual flux control in each plaquette. For appropriate values of the Josephson energy and charging energy of the junctions and the inductive energy of the nanowires, the arrays can be tuned between a periodicity of 2π and π by varying the external magnetic flux through the array. We describe the fabrication of these arrays and experiments to characterize the periodicity with phase by incorporating the array into an rf SQUID.

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Presenters

  • Yebin Liu

    Physics, Syracuse University, Syracuse University

Authors

  • Yebin Liu

    Physics, Syracuse University, Syracuse University

  • Kenneth Dodge

    Syracuse University, Physics, Syracuse University

  • Michael Anthony Senatore

    Physics, Syracuse University

  • Shaojiang Zhu

    Physics, University of Wisconsin-Madison

  • FNU Naveen

    Physics, University of Wisconsin-Madison

  • Abigail J Shearrow

    Physics, University of Wisconsin-Madison

  • Francisco Schlenker

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

  • Andrey Klots

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

  • Lara Faoro

    Physics, University of Wisconsin-Madison, LPTHE, CNRS, University of Wisconsin - Madison, University of Wisconsin-Madison

  • Lev B Ioffe

    Physics, University of Wisconsin-Madison, Department of Physics, University of Wisconsin, University of Wisconsin - Madison, University of Wisconsin-Madison

  • Robert F McDermott

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

  • B.L.T. Plourde

    Syracuse University, Physics, Syracuse University, Physics Department, Syracuse Univesity