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arXiv · 1103.2631

Dynamical Autler-Townes control of a phase qubit

Jian Li·G. S. Paraoanu·Katarina Cicak·Fabio Altomare·Jae I. Park·Raymond W. Simmonds·Mika A. Sillanpaa·Pertti J. Hakonen
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Abstract

Routers, switches, and repeaters are essential components of modern information-processing systems. Similar devices will be needed in future superconducting quantum computers. In this work we investigate experimentally the time evolution of Autler-Townes splitting in a superconducting phase qubit under the application of a control tone resonantly coupled to the second transition. A three-level model that includes independently determined parameters for relaxation and dephasing gives excellent agreement with the experiment. The results demonstrate that the qubit can be used as a ON/OFF switch with 100 ns operating time-scale for the reflection/transmission of photons coming from an applied probe microwave tone. The ON state is realized when the control tone is sufficiently strong to generate an Autler-Townes doublet, suppressing the absorption of the probe tone photons and resulting in a maximum of transmission.

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Jian Li, G. S. Paraoanu, Katarina Cicak, Fabio Altomare, Jae I. Park, Raymond W. Simmonds, Mika A. Sillanpaa, Pertti J. Hakonen. 2012-12-11. Dynamical Autler-Townes control of a phase qubit. https://doi.org/10.1038/srep00645

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