Spectroscopy of superconducting charge qubits coupled by a Josephson inductance

Yamamoto, T. and Watanabe, M. and You, J. Q. and Pashkin, Yuri and Astafiev, O. and Nakamura, Y. and Nori, F. and Tsai, J. S. (2008) Spectroscopy of superconducting charge qubits coupled by a Josephson inductance. Physical review B, 77 (6). -. ISSN 1098-0121

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Abstract

We have designed and experimentally implemented a circuit of inductively coupled superconducting charge qubits, where a Josephson junction is used as an inductance, and the coupling between the qubits is controlled by an applied magnetic flux. Spectroscopic measurements on the circuit are in good agreement with theoretical calculations. We observed anticrossings which originate from the coupling between the qubit and the plasma mode of the Josephson junction. Moreover, the size of the anticrossing depends on the external magnetic flux, which demonstrates the controllability of the coupling.

Item Type:
Journal Article
Journal or Publication Title:
Physical review B
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
57824
Deposited By:
Deposited On:
29 Aug 2012 07:49
Refereed?:
Yes
Published?:
Published
Last Modified:
19 Feb 2020 08:09