Low Temperature Physics: 30, 620 (2004); https://doi.org/10.1063/1.1789933 (9 pages)
Fizika Nizkikh Temperatur: Volume 30, Number 7-8 (July 2004), p. 823-833    ( to contents , go back )

Radio-frequency method for investigation of quantum properties of superconducting structures

E. Il’ichev1, A.Yu. Smirnov2, M. Grajcar3, A. Izmalkov1,4, D. Born1,5

1Institute for Physical High Technology, P.O. Box 100239, D-07702 Jena, Germany
2D-Wave Systems Inc., 320-1985 W. Broadway, Vancouver, B.C. , V6J 4Y3, Canada
E-mail: ilichev@ipht-jena.de

N. Oukhanski1, Th. Wagner1, W. Krech5, H.-G. Meyer1, and A. Zagoskin2,6

3Department of Solid State Physics, Comenius University, SK-84248 Bratislava, Slovakia
4Moscow Engineering Physics Institute (State University), Kashirskoe sh. 31 , Moscow, 115409, Russia

5Friedrich Schiller University, Institute of Solid State Physics, D-07743 Jena, Germany
6Physics and Astronomy Dept., The University of British Columbia 6224 Agricultural Rd., Vancouver, B.C., V6T 1Z1 Canada
pos Анотація:

Received January 28, 2004

Abstract

We implement the impedance measurement technique (IMT) for characterization of interferometer- type superconducting qubits. In the framework of this method, the interferometer loop is inductively coupled to a high-quality tank circuit. We show that the IMT is a powerful tool to study a response of externally controlled two-level system to different types of excitations. Conclusive information about qubits is obtained from the read-out of the tank properties.

PACS:
74.50.+r - Tunneling phenomena; point contacts, weak links, Josephson effects (for SQUIDs, see 85.25.Dq; for Josephson devices, see 85.25.Cp; for Josephson junction arrays, see 74.81.Fa)
85.25.-j - Superconducting devices

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