Measurement of Autler-Townes and Mollow transitions in a strongly driven superconducting qubit.
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 readout 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.
Baur
M
M
Department of Physics, ETH Zurich, CH-8093 Zurich, Switzerland.
Filipp
S
S
Bianchetti
R
R
Fink
J M
JM
Göppl
M
M
Steffen
L
L
Leek
P J
PJ
Blais
A
A
Wallraff
A
A