Experimental demonstration of flux-pulse-assisted readout on fluxonium qubits

ORAL

Abstract

In the pursuit of large-scale, fault-tolerant quantum computation, various superconducting architectures have been investigated as the potential building blocks for these systems. With the need for fast operations with low error rates, fluxonium qubits have recently gained an increasing amount of attention. The fluxonium qubit offers numerous advantages including a large anharmonicity, long coherence times, protection against flux noise, and resilience against dielectric loss. In an effort to maximize the potential of these devices, we employ flux-pulse-assisted readout to increase the signal to noise ratio and, thus, minimize the readout time required. This readout scheme capitalizes on the high dispersive shift afforded by avoided crossings between the readout resonator and higher order fluxonium transitions. We present experimental results in which we display an advantage of flux-pulse-assisted readout over static readout at the so-called "sweet-spot" on multiple fluxonium qubits.

* This work is suppored by the Engineering and Physical Sciences Research Council (EPSRC) under EP/SO23607/1 and the Dutch Research Council (NWO).

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Publication: We intend to publish the results from this work.

Presenters

  • 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

Authors

  • 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

  • Figen Yilmaz

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

  • Martijn F. S. Zwanenburg

    Delft University of Technology

  • Eugene Y Huang

    Delft University of Technology, 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

  • Lukas Johannes Splitthoff

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

  • Christian Kraglund Andersen

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