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Quantum landscape engineering of superconducting circuit ground states for higher-order coupler design

ORAL

Abstract

The response of the ground state energy of a superconducting circuit to external magnetic flux can be shaped by design to engineer quantum devices including artificial spin couplers. We propose a methodology for adding higher-order polynomial terms into the ground state energy versus flux by strongly coupling a series of rf SQUIDs. The fundamental instance of two rf SQUIDs generating a ground state with 4th-order terms is implemented experimentally. Probing this circuit with a sensor flux qubit, the qubit’s transition frequency maps the derivative of the quartic ground state in accordance with simulation. Modest levels of qubit coherence are maintained despite the relatively strong inductive coupling. These results demonstrate the viability of this design for use as a 4-local coupler and show promise for extending to higher polynomial order.

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Presenters

  • Tim Menke

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

Authors

  • Tim Menke

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

  • Cyrus F. Hirjibehedin

    MIT Lincoln Laboratory, University College London, UK

  • Steven Weber

    MIT Lincoln Laboratory

  • Jochen Braumüller

    Research Laboratory of Electronics, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology MIT

  • Antti Vepsalainen

    Research Laboratory of Electronics, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology MIT

  • Roni Winik

    Research Laboratory of Electronics, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology

  • Gabriel Orr Samach

    MIT Research Laboratory of Electronics, MIT Department of Electrical Engineering and Computer Science, MIT Lincoln Laboratory, Massachusetts Institute of Technology, MIT Lincoln Laboratory, Massachusetts Institute of Technology, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology, MIT Lincoln Laboratory

  • David K Kim

    MIT Lincoln Laboratory, MIT Lincoln Lab, MIT-Lincoln Lab, MIT Lincoln Laboratories, Lincoln Laboratory, Massachusetts Institute of Technology (MIT), Massachusetts Institute of Technology (MIT) Lincoln Laboratory

  • Alexander Melville

    MIT Lincoln Laboratory, MIT Lincoln Lab, MIT Lincoln Laboratories, Massachusetts Institute of Technology (MIT) Lincoln Laboratory

  • Bethany Niedzielski

    MIT Lincoln Laboratory

  • Danna Rosenberg

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

  • Mollie Schwartz

    MIT Lincoln Laboratory, MIT Lincoln Lab

  • Jonilyn Yoder

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

  • Alan Aspuru-Guzik

    Department of Chemistry and Department of Computer Science, Vector Institute for Artificial Intelligence, CIFAR Senior Fellow, University of Toronto, Department of Chemistry, University of Toronto, Computer Science, U Toronto

  • Simon Gustavsson

    Research Laboratory of Electronics, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology (MIT)

  • Andrew James Kerman

    MIT Lincoln Laboratory

  • William Oliver

    Research Laboratory of Electronics, Department of Electrical Engineering and Computer Science, Department of Physics, MIT Lincoln Laboratory, Massachusetts Institute of Techn, MIT Lincoln Lab, MIT Lincoln Laboratory, MIT Lincoln Laboratory, Massachusetts Institute of Technology, Department of Physics, Department of Electrical Engineering and Computer Science, Research Laboratory of Electronics, Lincoln Laboratory, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology MIT, Department of Electrical Engineering and Computer Science, Department of Physics, Massachusetts Institute of Technology; MIT Lincoln Laboratory, Department of Electrical Engineering and Computer Science, Department of Physics, MIT Lincoln Laboratory, Massachusetts Institute of Technology, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology, Research Laboratory of Electronics, Department of Electrical Engineering & Computer Science, Department of Physics, Massachusetts Institute of Technology and MIT Lincoln Labo, Physics, MIT, MIT-Lincoln Lab, MIT Lincoln Laboratories, Research Laboratory of Electronics, Department of Physics, Department of Electrical Engineering and Computer Science, Lincoln Laboratory, Massachusetts Institute of Technolog