Driven-state relaxation of a coupled qubit-defect system in spin-locking measurements

作者：L. V. Abdurakhimov, Imran Mahboob, Hiraku Toida, Kosuke Kakuyanagi, Yuichiro Matsuzaki, Shiro Saito · 发表于：Physical review. B./Physical review. B · 年份：2020 · DOI：10.1103/physrevb.102.100502 · 被引用次数：16 · 研究领域：Quantum and electron transport phenomena、Quantum Information and Cryptography、Quantum Computing Algorithms and Architecture

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.