Measurement of Autler-Townes and Mollow transitions in a strongly driven superconducting qubit

Details Measurement of Autler-Townes and Mollow transitions in a strongly driven superconducting qubit Measurement of Autler-Townes and Mollow transitions in a strongly driven superconducting qubit

2008-12-23

arxiv.org/abs/0812.4384v1

Phys. Rev. Lett. 102, 243602 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.102.243602

We present spectroscopic measurements of the Autler-Townes doublet and the sidebands of the Mollow triplet in a driven superconducting qubit. The ground to first excited state transition of the qubit is strongly pumped while the resulting dressed qubit spectrum is probed with a weak tone. The corresponding transitions are detected using dispersive read-out of the qubit coupled off-resonantly to a microwave transmission line resonator. The observed frequencies of the Autler-Townes and Mollow spectral lines are in good agreement with a dispersive Jaynes-Cummings model taking into account higher excited qubit states and dispersive level shifts due to off-resonant drives.

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