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. Sillanpää, Pertti J. Hakonen

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


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.

Original languageEnglish
Article number645
JournalScientific Reports
Publication statusPublished - 2012
Externally publishedYes

ASJC Scopus subject areas

  • Multidisciplinary


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