Dynamical Autler-Townes control of a phase qubit

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2012
Major/Subject
Mcode
Degree programme
Language
en
Pages
1-7
Series
Scientific Reports, Volume 2, Article number 645
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 transmissio
Description
Keywords
superconducting phase qubits, Autler-Townes control
Other note
Citation
Li, Jian & Paraoanu, G. S. & Cicak, Katarina & Altomare, Fabio & Park, Jae I. & Simmonds, Raymond W. & Sillanpää, Mika A. & Hakonen, Pertti J.. 2012. Dynamical Autler-Townes control of a phase qubit. Scientific Reports. Volume 2, Article number 645. 1-7. ISSN 2045-2322 (printed). DOI: 10.1038/srep00645.