A many-body coupler for coherent 4-local interaction of superconducting flux qubits
ORAL
Abstract
Interactions of more than two bodies simultaneously rarely appear in nature. Even in dense systems, forces usually act pairwise. However, n-local terms with n>3 frequently arise when mapping physical or mathematical problems to an Ising spin Hamiltonian. Superconducting flux qubits have emerged as a promising, versatile platform to simulate such spin systems and find their ground state, but the implementation of n-local superconducting qubit couplers has so far proven elusive. Here we present a circuit that enables large 4-local interaction between four flux qubits without spurious 2-local terms and without relying on an effective low-energy description as in Hamiltonian gadgets. We demonstrate numerically how 4-local coupling of up to several hundred MHz arises from a coupler circuit with tailored spectral properties. These properties are engineered by combining known superconducting circuit physics with suggestions by an inverse design algorithm that we have developed previously. In addition, we show first experimental results probing a fabricated coupler prototype.
*This research was funded by the Office of the Director of National Intelligence (ODNI), Intelligence Advanced Research Projects Activity (IARPA) under Air Force Contract No. FA8721-05-C-0002.
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Presenters
Tim Menke
Department of Physics, Harvard University; Department of Physics, MIT; Research Laboratory of Electronics, MIT
Authors
Tim Menke
Department of Physics, Harvard University; Department of Physics, MIT; Research Laboratory of Electronics, MIT
Cyrus F. Hirjibehedin
MIT Lincoln Laboratory
London Centre for Nanotechnology, University College London
Steven J. Weber
MIT Lincoln Laboratory
Gabriel O. Samach
Lincoln Lab, Massachusetts Institute of Technology, USA
MIT Lincoln Laboratory
Department of Electrical Engineering and Computer Science, MIT; MIT Lincoln Laboratory
Simon Gustavsson
Research Laboratory of Electronics, Massachusetts Institute of Technology
Massachusetts Institute of Technology
Research Laboratory of Electronics, Massachusetts Institute of Technology, USA
Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139
Research Laboratory of Electronics, MIT
Alan Aspuru-Guzik
Zapata Computing
Chemistry and Computer Science, University of Toronto
University of Toronto, Department of Chemistry, and Computer Science
Department of Chemistry and Department of Computer Science, University of Toronto; Vector Institute for Artificial Intelligence, Toronto; Canadian Institute for Advanced Rese
University of Toronto
William D Oliver
Research Laboratory of Electronics, Massachusetts Institute of Technology
Department of Physics, Research Laboratory of Electronics, Lincoln Laboratory, Massachusetts Institute of Technology
MIT Lincoln Lab
MIT Lincoln Laboratory, Department of Physics, Massachusetts Institute of Technology
MIT Lincoln Laboratory
Massachusetts Institute of Technology
Research Laboratory of Electronics, Physics, Lincoln Laboratory, Massachusetts Institute of Technology
Department of Physics, Massachusetts Institute of Technology
Research Laboratory of Electronics, Massachusetts Institute of Technology, MIT Lincoln Laboratory, Physics, Massachusetts Institute of Technology
Dept. of Physics, Research Laboratory of Electronics, and Lincoln Lab, Massachusetts Institute of Technology, USA
Research Laboratory of Electronics, Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, MIT Lincoln Laboratory, 244 Wood Street, Lexington, MA
Massachusetts Institute of Technology and MIT Lincoln Laboratory
Research Laboratory of Electronics, MIT Lincoln Laboratory, Department of Physics, Massachusetts Institute of Technology
Department of Physics, Research Laboratory of Electronics, MIT Lincoln Laboratory, Massachusetts Institute of Technology
Department of Physics, MIT; Research Laboratory of Electronics, MIT; MIT Lincoln Laboratory
