A Rotary Echo Flux Qubit

ORAL

Abstract

Flux qubits can have long T1 decay times due to nearly disjoint support of their flux basis wavefunctions. However the coupling of flux noise to circulating currents can lead to short dephasing times. This talk describes a qubit that utilizes a rotary echo control technique to maintain long T1 times yet also generating insensitivity to flux noise below a cutoff frequency. As the majority of the flux noise is low frequency in nature, this generates a qubit design capable of achieving high coherence.

*This research was supported by the Army Research Office under contract W911NF-17-C-0024.

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Presenters

  • Alexander K Sirota

    • Northrop Grumman - Mission Systems

Authors

  • Alexander K Sirota

    • Northrop Grumman - Mission Systems

  • David Ferguson

    • Northrop Grumman - Mission Systems
    • Northrop Grumman Corporation

  • David I Schuster

    • University of Chicago
    • Physics, University of Chicago
    • Department of Physics and the James Franck Institute, University of Chicago
    • The James Franck Institute and Department of Physics, University of Chicago
    • The James Franck Institute and Department of Physics, The University of Chicago

  • Ryan J Epstein

    • Northrop Grumman - Mission Systems