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Superconducting Qubits

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

arXiv
Authors: F. Wulschner, J. Goetz, F. R. Koessel, E. Hoffmann, A. Baust, P. Eder, M. Fischer, M. Haeberlein, M. J. Schwarz, M. Pernpeintner, E. Xie, L. Zhong, C. W. Zollitsch, B. Peropadre, J. -J. Garcia Ripoll, E. Solano, K. Fedorov, E. P. Menzel, F. Deppe, A. Marx, R. Gross

Year

2015

Paper ID

27598

Status

Preprint

Abstract Read

~2 min

Abstract Words

98

Citations

N/A

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. From the mode distance observed in spectroscopy experiments, we derive a coupling strength ranging between -320MHz and 37 MHz. In the case where the coupling strength is about zero, the microwave power cross transmission between the two resonators can be reduced by almost four orders of magnitude compared to the case where the coupling is switched on. In addition, we observe parametric amplification by applying a suitable additional drive tone.

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  • This paper contributes to the Superconducting Qubits research area in the Quantum Articles archive.
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  • We realize tunable coupling between two superconducting transmission line resonators.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1508.06758 [2] arXiv https://arxiv.org/abs/1508.06758 [3] Publisher https://arxiv.org/abs/1508.06758

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