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  • Letter
  • Open Access

Spectrum analysis with parametrically modulated transmon qubits

Nir Gavrielov1,*, Santiago Oviedo-Casado2,3,†, and Alex Retzker1,4,‡

  • *Contact author: nir.gavrielov@mail.huji.ac.il
  • †Contact author: oviedo.cs@mail.huji.ac.il
  • ‡Contact author: retzker@phys.huji.ac.il
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Phys. Rev. Research 7, L012056 – Published 6 March, 2025

DOI: https://doi.org/10.1103/PhysRevResearch.7.L012056

Abstract

Exploring the noise spectrum impacting a qubit and extending its coherence duration are fundamental components of quantum technologies. In this study, we introduce parametric spectroscopy, a method that merges parametric modulation of a qubit's energy gap with dynamical decoupling sequences. The parametric modulation provides high sensitivity to extensive regions of the noise spectrum, while dynamical decoupling reduces the effect of driving noise. Our theoretical study shows that parametric spectroscopy enables access to the difficult high-frequency domain of the flux spectrum in transmons.

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Phys. Rev. Research 7, L012056– Published 6 March, 2025
  • Received 15 July 2024
  • Accepted 28 January 2025
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