Observation of Autler–Townes effect in a dispersively dressed Jaynes–Cummings system

B Suri; Z K Keane; R Ruskov; Lev S Bishop; C Tahan; S Novikov; J E Robinson; F C Wellstood; B S Palmer

doi:10.1088/1367-2630/15/12/125007

New Journal of Physics (Jan 2013)

Observation of Autler–Townes effect in a dispersively dressed Jaynes–Cummings system

B Suri,
Z K Keane,
R Ruskov,
Lev S Bishop,
C Tahan,
S Novikov,
J E Robinson,
F C Wellstood,
B S Palmer

Affiliations

B Suri: Laboratory for Physical Sciences, College Park, MD 20740, USA; Department of Physics, University of Maryland , College Park, MD 20742, USA
Z K Keane: Laboratory for Physical Sciences, College Park, MD 20740, USA; Department of Physics, University of Maryland , College Park, MD 20742, USA
R Ruskov: Laboratory for Physical Sciences, College Park, MD 20740, USA
Lev S Bishop: Department of Physics, University of Maryland , College Park, MD 20742, USA; Joint Quantum Institute, University of Maryland , College Park, MD 20742, USA; Condensed Matter Theory Center, Department of Physics, University of Maryland , College Park, MD 20742, USA
C Tahan: Laboratory for Physical Sciences, College Park, MD 20740, USA
S Novikov: Laboratory for Physical Sciences, College Park, MD 20740, USA; Department of Physics, University of Maryland , College Park, MD 20742, USA
J E Robinson: Laboratory for Physical Sciences, College Park, MD 20740, USA
F C Wellstood: Department of Physics, University of Maryland , College Park, MD 20742, USA; Joint Quantum Institute, University of Maryland , College Park, MD 20742, USA; Center for Nanophysics and Advanced Materials, University of Maryland , College Park, MD 20742, USA
B S Palmer: Laboratory for Physical Sciences, College Park, MD 20740, USA; Department of Physics, University of Maryland , College Park, MD 20742, USA

DOI: https://doi.org/10.1088/1367-2630/15/12/125007
Journal volume & issue: Vol. 15, no. 12
p. 125007

Abstract

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We report on the spectrum of a superconducting transmon device coupled to a planar superconducting resonator in the strong dispersive limit where discrete peaks, each corresponding to a different number of photons, are resolved. A thermal population of 5.474 GHz photons at an effective resonator temperature of T = 120 mK results in a weak n = 1 photon peak along with the n = 0 photon peak in the qubit spectrum in the absence of a coherent drive on the resonator. Two-tone spectroscopy using independent coupler and probe tones reveals an Autler–Townes splitting in the thermal n = 1 photon peak. The observed effect is explained accurately using the four lowest levels of the dispersively dressed qubit–resonator system and compared to results from numerical simulations of the steady-state master equation for the coupled system.

Published in New Journal of Physics

ISSN: 1367-2630 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Physics
Website: https://iopscience.iop.org/journal/1367-2630

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