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Towards a 4-local coupler for superconducting flux qubits - part 2: distinguishing multi-spin interactions from lower-order effects

ORAL

Abstract

Many-local coupling can be effectively achieved with artificial quantum spins but is challenging to verify experimentally. Here we present a method to characterize many-local interactions by analyzing the variation of the system’s spectral gap with the local spin fields. By using generally accessible measurement techniques, we numerically simulate experimental quantification of many-local interactions. These interactions are shown to be distinguishable from lower-order contributions, which demonstrates that the method enables robust exploration of many-local interactions across a broad range of coupling strengths and can be implemented for a variety of qubit modalities.

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Presenters

  • Thomas Bergamaschi

    MIT Department of Physics

Authors

  • Thomas Bergamaschi

    MIT Department of Physics

  • Tim Menke

    Harvard Department of Physics, MIT Research Laboratory of Electronics, MIT Department of Physics, MIT Research Laboratory of Electronics, MIT Department of Physics, Harvard Department of Physics, Department of Physics, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology

  • Cyrus Hirjibehedin

    MIT Lincoln Laboratory, Lincoln Laboratory, MIT, MIT - Lincoln Laboratory

  • Steven Weber

    MIT Lincoln Laboratory, MIT Lincoln Lab, Lincoln Laboratory, MIT, MIT - Lincoln Laboratory

  • Andrew James Kerman

    MIT Lincoln Laboratory, MIT Lincoln Lab, Lincoln Laboratory, MIT, MIT - Lincoln Laboratory

  • William Oliver

    MIT Lincoln Laboratory, Research Laboratory of Electronics, Massachusetts Institute of Technology, Research Laboratory of Electronics, MIT Lincoln Laboratory, Department of Electrical Engineering and Computer Science, MIT Research Laboratory of Electronics, MIT Lincoln Laboratory, MIT Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology, MIT Lincoln Laboratory, MIT, MIT, MIT Lincoln Lab, MIT Lincoln Lab, MIT Lincoln Lab, Massachusetts Institute of Technology, Research Laboratory of Electronics, Department of Electrical Engineering and Computer Science, and Department of Physics, Massachusetts Institute of Technology. MIT Lincoln L, Department of Physics, Department of Electrical Engineering & Computer Science, Research Laboratory of Electronics, MIT Lincoln Laboratory, Massachusetts Institute of Technol, Lincoln Laboratory, Research Laboratory of Electronics, and Department of Electrical Engineering & Computer Science, MIT