Improving quantum control of the soft 0-pi qubit through device engineering

ORAL

Abstract

Ideally, 0-Pi qubit is fully protected against both depolarization and dephasing noise. However, realizing it is a difficult task because of the strict device-fabrication constraints. Therefore, soft 0-Pi qubit has been introduced as an alternative, which is achievable with current technology at the expense of weaker flux-noise protection. However, implementing fast qubit control while avoiding leakage is one of the big challenges that soft 0-Pi qubit faces. In this talk, we explore the parameter space of the soft 0-Pi qubit to maximize coherence and gate speed through low-lying Raman transitions. Moreover, we discuss fabrication constraints and technological considerations that could help push the qubit's design beyond the soft 0-Pi qubit.

*This research was funded in part by the U.S. Army Research Office (ARO) Multidisciplinary University Research Initiative (MURI) W911NF-18-1-0411; and by the Under Secretary of Defense for Research and Engineering under Air Force Contract No. FA8702-15-D-0001. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the U.S. Government. This material is based upon work supported in part by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Co-design Center for Quantum Advantage (C2QA) under contract number DE-SC0012704. J.A. acknowledges support from the Korea Foundation for Advanced Studies.

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Presenters

  • Junyoung An

    • Massachusetts Institute of Technology MI
    • Massachusetts Institute of Technology MIT

Authors

  • Junyoung An

    • Massachusetts Institute of Technology MI
    • Massachusetts Institute of Technology MIT

  • Agustin Di Paolo

    • Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
    • Universite de Sherbrooke
    • MIT
    • Massachusetts Institute of Technology MIT
    • Research Laboratory of Electronics, Massachusetts Institute of Technology
    • Massachusetts Institute of Technology

  • Roni Winik

    • Massachusetts Institute of Technology MIT

  • Leon Ding

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology MI

  • Kyle Serniak

    • MIT Lincoln Lab
    • MIT Lincoln Laboratory

  • Thomas M Hazard

    • MIT Lincoln Lab
    • MIT Lincoln Laboratory

  • Terry P Orlando

    • Massachusetts Institute of Technology MIT

  • Simon Gustavsson

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology

  • William D Oliver

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology Research Laboratory of Electronics
    • MIT Lincoln Laboratory and Department of Electrical Engineering & Computer Science and Department of Physics, Massachusetts Institute of Technology