Engineering multi-qubit interactions between superconducting flux qubits

ORAL

Abstract

Nonpairwise multi-qubit interactions present a useful resource for quantum information processors. Their implementation would enable analog simulations of molecules and combinatorial optimization problems, and they could simplify error suppression and correction schemes. In this talk, we present a superconducting circuit architecture in which a coupling module mediates interactions between four flux qubits. The system Hamiltonian is estimated via multi-qubit pulse sequences that implement Ramsey-type interferometry between all neighboring excitation manifolds in the system. Interactions are determined with the coupler on and off, and we present evidence for multi-spin coupling mechanisms. Spectroscopic techniques, combined with numerical simulations of the circuit, permit an extrapolation of the interactions beyond the coherent regime of the qubits.

*This research was funded by the Office of the Director of National Intelligence (ODNI), Intelligence Advanced Research Projects Activity (IARPA); 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 ODNI, IARPA, or the U.S. Government.

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Presenters

  • Tim Menke

    • Harvard University, Massachusetts Institute of Technology Research Laboratory of Electronics
    • Harvard University

Authors

  • Tim Menke

    • Harvard University, Massachusetts Institute of Technology Research Laboratory of Electronics
    • Harvard University

  • William P Banner

    • Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science
    • Massachusetts Institute of Technology MI

  • Thomas R Bergamaschi

    • Department of Physics, Massachusetts Institute of Technology
    • Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA

  • 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

  • Antti Vepsalainen

    • Massachusetts Institute of Technology MIT

  • Steven J Weber

    • MIT Lincoln Lab

  • Roni Winik

    • Massachusetts Institute of Technology MIT

  • David K Kim

    • MIT Lincoln Lab
    • MIT Lincoln Laboratory

  • Alexander Melville

    • MIT Lincoln Laboratory
    • MIT Lincoln Lab

  • Bethany M Niedzielski

    • MIT Lincoln Lab
    • MIT Lincoln Laboratory

  • Danna Rosenberg

    • Massachusetts Institute of Technology MIT

  • Mollie E Schwartz

    • MIT Lincoln Laboratory
    • MIT Lincoln Lab

  • Kyle Serniak

    • MIT Lincoln Lab
    • MIT Lincoln Laboratory

  • Jonilyn L Yoder

    • MIT Lincoln Lab
    • MIT Lincoln Laboratory

  • Jeffrey A Grover

    • Massachusetts Institute of Technology MI
    • Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science
    • Massachusetts Institute of Technology MIT
    • Northrop Grumman - Mission Systems
    • Massachusetts Institute of Technology

  • Simon Gustavsson

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology

  • Cyrus F Hirjibehedin

    • MIT Lincoln Lab

  • Andrew J Kerman

    • MIT Lincoln Lab

  • 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