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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.

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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