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Mediating interactions between superconducting microwave cavities with three-wave mixing, part 1

ORAL

Abstract

Engineering tunable bilinear couplings between microwave cavities provides a way to manipulate and entangle long-lived quantum states. Two-cavity gates, such as the beam splitter and exponential SWAP (eSWAP), have been successfully demonstrated using a driven transmon coupled to both cavities. However, the fidelity of these gates is limited by unwanted 4th order processes such as the AC Stark effect. By replacing the transmon’s Josephson junction with a superconducting nonlinear asymmetric inductive element (SNAIL), we produce a bilinear interaction via its 3rd order nonlinearity while minimizing 4th order effects. This is expected to offer high fidelity two-cavity gates using all-RF control. I will discuss experimental design considerations and the theory behind the coupled-cavity device.

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Presenters

  • Stijn de Graaf

    Yale University

Authors

  • Stijn de Graaf

    Yale University

  • Benjamin Chapman

    Yale University

  • Yaxing Zhang

    Yale University

  • Shantanu O Mundhada

    Yale University, Department of Applied Physics, Yale University

  • Akshay Koottandavida

    Yale University, Department of Applied Physics, Yale University

  • Nicholas Frattini

    Yale University

  • Luke Burkhart

    Yale University

  • Alexander P Read

    Yale University

  • Luigi Frunzio

    Yale University, Department of Applied Physics, Yale University, Departments of Applied Physics and Physics, Yale University

  • Steven Girvin

    Yale University, Department of Physics and Applied Physics, Yale University, Department of Physics, Yale University, Yale Quantum Institute, Yale University

  • Michel H. Devoret

    Yale University, Department of Applied Physics, Yale University, Applied Physics, Yale University

  • Robert Schoelkopf

    Yale University, Department of Applied Physics, Yale University, Departments of Applied Physics and Physics, Yale University