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Fluxonium-like qubit design for improved coherence

ORAL

Abstract

Fluxonium qubits provide high anharmonicity and can offer states with disjoint support and large relaxation time. There has been significant progress in exploring different parameter regimes of the fluxonium for optimizing coherence times. However, in traditional fluxonium qubits, the external flux sweet spot is only present when external magnetic flux threading through the superconducting loop is either 0 or 0.5 flux quantum. Additional sweet spots can be achieved via the careful engineering of the Hamiltonian. We present experimental data on the implementation of such a fluxonium-like qubit architecture with extra sweet spots.

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Presenters

  • Pranav Mundada

    Princeton University, Department of Electrical Engineering, Princeton University, Electrical Engineering, Princeton University

Authors

  • Pranav Mundada

    Princeton University, Department of Electrical Engineering, Princeton University, Electrical Engineering, Princeton University

  • Andrew Houck

    Princeton University, Electrical Engineering, Princeton University, Department of Electrical Engineering, Princeton University

  • Andras Gyenis

    Princeton University, Department of Electrical Engineering, Princeton University

  • Ziwen Huang

    Northwestern University, Physics, Northwestern University

  • Jens Koch

    Northwestern University, Physics and Astronomy, Northwestern University, Department of Physics and Astronomy, Northwestern University, Physics, Northwestern University