Designing Two-Fluxonium Qubits with a Tunable Coupler

ORAL

Abstract

The scalability of quantum systems is an important consideration as we strive for large-scale quantum computing. A candidate for a superconducting qubit architecture is the fluxonium qubit which offers numerous advantages, including low error rates. Compared to the conventional transmon qubit, the fluxonium is realized with one additional element: a linear inductor. The imposing challenge for fluxonium qubits is to design two coupled fluxonium qubits and realize two-qubit gate implementations with high fidelity. In this talk, I will present a design for a two-fluxonium device with the qubit-qubit coupling enabled by a transmon coupler. The device is implemented using our established fluxonium design that we have integrated into IBM Qiskit Metal. In particular, I will discuss the analysis of the device parameters and how we have optimized the design to enable the desired high-fidelity two-qubit gate.

*This research was co-funded by the Dutch Research Council (NWO).

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Presenters

  • Figen Yilmaz

    • Delft University of Technology
    • QU Tech
    • Delft University of Technology (TU Delft)
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology

Authors

  • Figen Yilmaz

    • Delft University of Technology
    • QU Tech
    • Delft University of Technology (TU Delft)
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Siddharth Singh

    • Delft University of Technology
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Siyu Wang

    • Delft University of Technology

  • Eugene Y Huang

    • Delft University of Technology
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Martijn F Zwanenburg

    • Delft University of Technology
    • QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Taryn V Stefanski

    • Delft University of Technology
    • Quantum Engineering Centre for Doctorial Training, University of Bristol and QuTech and Kavli Institute of Nanoscience, Delft University of Technology

  • Christian K Andersen

    • Delft University of Technology