Rabi spectroscopy of a qubit-fluctuator system

Lisenfeld, Juergen, Mueller, Clemens, Cole, Jared H., Bushev, Pavel, Lukashenko, Alexander, Shnirman, Alexander and Ustinov, Alexey V. (2010) Rabi spectroscopy of a qubit-fluctuator system. Physical Review B (Condensed Matter and Materials Physics), 81 10: . doi:10.1103/PhysRevB.81.100511

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Author Lisenfeld, Juergen
Mueller, Clemens
Cole, Jared H.
Bushev, Pavel
Lukashenko, Alexander
Shnirman, Alexander
Ustinov, Alexey V.
Title Rabi spectroscopy of a qubit-fluctuator system
Journal name Physical Review B (Condensed Matter and Materials Physics)   Check publisher's open access policy
ISSN 1098-0121
Publication date 2010-03-25
Year available 2010
Sub-type Article (original research)
DOI 10.1103/PhysRevB.81.100511
Open Access Status File (Publisher version)
Volume 81
Issue 10
Total pages 4
Place of publication College Park, MD United States
Publisher American Physical Society
Language eng
Subject 3104 Condensed Matter Physics
2504 Electronic, Optical and Magnetic Materials
Abstract Superconducting qubits often show signatures of coherent coupling to microscopic two-level fluctuators (TLFs), which manifest themselves as avoided level crossings in spectroscopic data. In this work we study a phase qubit, in which we induce Rabi oscillations by resonant microwave driving. When the qubit is tuned close to the resonance with an individual TLF and the Rabi driving is strong enough (Rabi frequency of order of the qubit-TLF coupling), interesting four-level dynamics are observed. The experimental data show a clear asymmetry between biasing the qubit above or below the fluctuator's level splitting. Theoretical analysis indicates that this asymmetry is due to an effective coupling of the TLF to the external microwave field induced by the higher qubit levels.
Keyword Physics, Condensed Matter
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID W911NF-09-1-0336
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
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Citation counts: TR Web of Science Citation Count  Cited 28 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 28 times in Scopus Article | Citations
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