Tunable coupling of transmission-line microwave resonators mediated by an rf SQUID

Friedrich Wulschner, Jan Goetz, Fabian R. Koessel, Elisabeth Hoffmann, Alexander Baust, Peter Eder, Michael Fischer, Max Haeberlein, Manuel J. Schwarz, Matthias Pernpeintner, Edwar Xie, Ling Zhong, Christoph W. Zollitsch, Borja Peropadre, Juan Jose Garcia Ripoll, Enrique Solano, Kirill G. Fedorov, Edwin P. Menzel, Frank Deppe, Achim MarxRudolf Gross

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

We realize tunable coupling between two superconducting transmission line resonators. The coupling is mediated by a non-hysteretic rf SQUID acting as a flux-tunable mutual inductance between the resonators. We present a spectroscopic characterization of the device. In particular, we observe couplings g/2π ranging between –320 MHz and 37 MHz. In the case of g 0, the microwave power cross transmission between the two resonators is reduced by almost four orders of magnitude as compared to the case where the coupling is switched on.

Original languageEnglish
Article number10
JournalEPJ Quantum Technology
Volume3
Issue number1
DOIs
StatePublished - 1 Dec 2016

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