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

• URL: http://arxiv.org/abs/2006.05820v2
• Date: Fri, 14 Aug 2020 11:39:06 GMT
• Title: Driven-state relaxation of a coupled qubit-defect system in spin-locking measurements
• Authors: Leonid V. Abdurakhimov, Imran Mahboob, Hiraku Toida, Kosuke Kakuyanagi, Yuichiro Matsuzaki, and Shiro Saito
• Abstract summary: We show that the relaxation rate of the driven spin-locking state of a qubit can be significantly affected by an off-resonant high-frequency two-level-system defect.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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.

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