Nature Communications (Dec 2017)

Application of optimal band-limited control protocols to quantum noise sensing

  • V. M. Frey,
  • S. Mavadia,
  • L. M. Norris,
  • W. de Ferranti,
  • D. Lucarelli,
  • L. Viola,
  • M. J. Biercuk

DOI
https://doi.org/10.1038/s41467-017-02298-2
Journal volume & issue
Vol. 8, no. 1
pp. 1 – 8

Abstract

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Control of qubits’ frequency response by dynamical decoupling is usually vexed by control’s out-of-band harmonics, a problem known in metrology as “spectral leakage”. Here, the authors reduce this problem by orders of magnitude exploiting discrete prolate spheroidal sequences to control a trapped-ion qubit.