Parametric control of a superconducting flux qubit

Parametric control of a superconducting flux qubit has been achieved by using two-frequency microwave pulses. We have observed Rabi oscillations stemming from parametric transitions between the qubit states when the sum of the two microwave frequencies or the difference between them matches the qubi...

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Bibliographic Details
Published inPhysical review letters Vol. 96; no. 10; p. 107001
Main Authors Saito, S, Meno, T, Ueda, M, Tanaka, H, Semba, K, Takayanagi, H
Format Journal Article
LanguageEnglish
Published United States 17.03.2006
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Summary:Parametric control of a superconducting flux qubit has been achieved by using two-frequency microwave pulses. We have observed Rabi oscillations stemming from parametric transitions between the qubit states when the sum of the two microwave frequencies or the difference between them matches the qubit Larmor frequency. We have also observed multiphoton Rabi oscillations corresponding to one- to four-photon resonances by applying single-frequency microwave pulses. The parametric control demonstrated in this work widens the frequency range of microwaves for controlling the qubit and offers a high quality testing ground for exploring nonlinear quantum phenomena of macroscopically distinct states.
ISSN:0031-9007
DOI:10.1103/physrevlett.96.107001