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Fast feedback for active noise cancellation in superconducting qubits

ORAL

Abstract

Superconducting qubits are a promizing platform for realizing quantum computer. However, due to recent advances in qubit control, both single- and two-qubit gate fidelities are starting to be limited by the coherence times of the qubits. Here we show that by employing fast-feedback to cancel low-frequency noise disturbing the circuit, the fluctuations in the qubit frequency are stabilized, resulting in improved coherence time and gate fidelities. This enables high-fidelity operation of transmon qubits even when they are biased away from their flux sweetspot, helping to solve frequency crowding issues as well as reducing drifts in control parameters.

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Presenters

  • Antti Vepsalainen

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

Authors

  • Antti Vepsalainen

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

  • Roni Winik

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

  • Amir Karamlou

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

  • Jochen Braumueller

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

  • Youngkyu Sung

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

  • Bharath Kannan

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

  • Morten Kjaergaard

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

  • David K Kim

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

  • Jonilyn Yoder

    MIT Lincoln Laboratory, MIT Lincoln Lab, Research Laboratory of Electronics, Massachusetts Institute of Technology, Lincoln Laboratory, MIT, MIT - Lincoln Laboratory, Massachusetts Institute of Technology MIT

  • Bethany Niedzielski

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

  • Terry Philip Orlando

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

  • Simon Gustavsson

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

  • William Oliver

    MIT Lincoln Laboratory, Research Laboratory of Electronics, Massachusetts Institute of Technology, Research Laboratory of Electronics, MIT Lincoln Laboratory, Department of Electrical Engineering and Computer Science, MIT Research Laboratory of Electronics, MIT Lincoln Laboratory, MIT Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Research Laboratory of Electronics, Massachusetts Institute of Technology, MIT Lincoln Laboratory, MIT, MIT, MIT Lincoln Lab, MIT Lincoln Lab, MIT Lincoln Lab, Massachusetts Institute of Technology, Research Laboratory of Electronics, Department of Electrical Engineering and Computer Science, and Department of Physics, Massachusetts Institute of Technology. MIT Lincoln L, Department of Physics, Department of Electrical Engineering & Computer Science, Research Laboratory of Electronics, MIT Lincoln Laboratory, Massachusetts Institute of Technol, Lincoln Laboratory, Research Laboratory of Electronics, and Department of Electrical Engineering & Computer Science, MIT