Nature Communications (Apr 2022)

Improving qubit coherence using closed-loop feedback

  • Antti Vepsäläinen,
  • Roni Winik,
  • Amir H. Karamlou,
  • Jochen Braumüller,
  • Agustin Di Paolo,
  • Youngkyu Sung,
  • Bharath Kannan,
  • Morten Kjaergaard,
  • David K. Kim,
  • Alexander J. Melville,
  • Bethany M. Niedzielski,
  • Jonilyn L. Yoder,
  • Simon Gustavsson,
  • William D. Oliver

DOI
https://doi.org/10.1038/s41467-022-29287-4
Journal volume & issue
Vol. 13, no. 1
pp. 1 – 7

Abstract

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The presence of various noises in the qubit environment is a major limitation on qubit coherence time. Here, the authors demonstrate the use a closed-loop feedback to stabilize frequency noise in a flux-tunable superconducting qubit and suggest this as a scalable approach applicable to other types of noise.