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 journalArticleScientificpeer-review

42 Citations (Scopus)
62 Downloads (Pure)

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.
Original languageEnglish
Article number645
Pages (from-to)1-7
Number of pages7
JournalScientific Reports
Volume2
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

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