Tunable XX-Coupling Between High Coherence Flux Qubits

ORAL

Abstract

The first generation of quantum annealers based on Josephson junction technology successfully represent arrays of spins in the quantum transverse-field Ising model. However, to date, no annealing architecture has emulated the more sophisticated non-stoquastic Hamiltonians of interest for next generation quantum annealing. Here, we present our recent results for tunable XX-coupling between high coherence superconducting flux qubits, as well as robust device simulations of these coupled quantum systems. We consider the capabilities and limitations of annealing architectures based on these two-qubit building blocks, and we address specifically our efforts to engineer strong XX-coupling in the absence of local qubit fields, an inherent limitation of all existing flux qubit-based annealing systems.

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Presenters

  • Gabriel Samach

    Lincoln Laboratory, Massachusetts Institute of Technology, MIT Lincoln Lab, MIT Lincoln Laboratory

Authors

  • Gabriel Samach

    Lincoln Laboratory, Massachusetts Institute of Technology, MIT Lincoln Lab, MIT Lincoln Laboratory

  • Steven Weber

    MIT Lincoln Lab, MIT Lincoln Laboratory

  • David Hover

    MIT Lincoln Laboratory, MIT Lincoln Lab

  • Danna Rosenberg

    MIT Lincoln Laboratory, MIT Lincoln Lab, Massachusetts Inst of Tech-MIT, Lincoln Laboratory, Massachusetts Inst of Tech-MIT

  • Jonilyn Yoder

    MIT Lincoln Laboratory, MIT Lincoln Lab, Lincoln Laboratory, Massachusetts Institute of Technology, Massachusetts Inst of Tech-MIT, Lincoln Laboratory, Massachusetts Inst of Tech-MIT

  • David Kim

    MIT Lincoln Laboratory, MIT Lincoln Lab, Lincoln Laboratory, Massachusetts Institute of Technology, Massachusetts Inst of Tech-MIT, Lincoln Laboratory, Massachusetts Inst of Tech-MIT

  • William Oliver

    MIT Lincoln Laboratory, MIT Lincoln Lab, Massachusetts Institute of Technology & MIT Lincoln Laboratory, Department of Physics, Research Laboratory of Electronics, Lincoln Laboratory, Massachusetts Institute of Technology, Massachusetts Inst of Tech-MIT, Department of Physics, Research Laboratory of Electronics, Lincoln Laboratory, Massachusetts Inst of Tech-MIT, MIT, Lincoln Laboratory, Research Laboratory of Electronics, and Department of Physics, Massachusetts Institute of Technology, Department of Physics, Research Laboratory of Electronics, Lincoln Laboratory, Massachusetts institute of Technology

  • Andrew Kerman

    MIT Lincoln Laboratory, Massachusetts Inst of Tech-MIT, MIT Lincoln Lab