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

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

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 ra...

Full description

Saved in:
Bibliographic Details
Main Authors: Wulschner, F, Goetz, J, Koessel, F. R, Hoffmann, E, Baust, A, Eder, P, Fischer, M, Haeberlein, M, Schwarz, M. J, Pernpeintner, M, Xie, E, Zhong, L, Zollitsch, C. W, Peropadre, B, Ripoll, J. -J. Garcia, Solano, E, Fedorov, K, Menzel, E. P, Deppe, F, Marx, A, Gross, R
Format: Journal Article
Language:English
Published: 27-08-2015
Subjects:
Physics - Quantum Physics
Physics - Superconductivity
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
DOI:10.48550/arxiv.1508.06758