It is widely known that spin-locking noise-spectroscopy is a powerful technique for the characterization of low-frequency noise mechanisms in superconducting qubits. Here we show that the relaxation rate of the driven spin-locking state of a qubit can be significantly affected by the presence of an off-resonant high-frequency two-level-system defect. Thus, both low- and high-frequency defects should be taken into account in the interpretation of spin-locking measurements and other types of driven-state noise-spectroscopy.
@article{arxiv.2006.05820,
title = {Driven-state relaxation of a coupled qubit-defect system in spin-locking measurements},
author = {Leonid V. Abdurakhimov and Imran Mahboob and Hiraku Toida and Kosuke Kakuyanagi and Yuichiro Matsuzaki and Shiro Saito},
journal= {arXiv preprint arXiv:2006.05820},
year = {2020}
}
Comments
main text (6 pages, 3 figures) + supplemental material (8 pages, 9 figures)