University of Oulu

Appl. Phys. Lett. 115, 082601 (2019);

Fast control of dissipation in a superconducting resonator

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Author: Sevriuk, V. A.1; Tan, K. Y.1; Hyyppä, E.1;
Organizations: 1QCD Labs, QTF Centre of Excellence, Department of Applied Physics, Aalto University, PO Box 13500, FI-00076 Aalto, Finland
2Research Unit of Nano and Molecular Systems, University of Oulu, PO Box 3000, FI-90014 Oulu, Finland
3VTT Technical Research Centre of Finland Ltd., P.O. Box 1000, FI-02044 VTT, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.4 MB)
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Language: English
Published: American Institute of Physics, 2019
Publish Date: 2019-08-27


We report on fast tunability of an electromagnetic environment coupled to a superconducting coplanar waveguide resonator. Namely, we utilize a recently developed quantum-circuit refrigerator (QCR) to experimentally demonstrate a dynamic tunability in the total damping rate of the resonator up to almost two orders of magnitude. Based on the theory, it corresponds to a change in the internal damping rate by nearly four orders of magnitude. The control of the QCR is fully electrical, with the shortest implemented operation times in the range of 10 ns. This experiment constitutes a fast active reset of a superconducting quantum circuit. In the future, a similar scheme can potentially be used to initialize superconducting quantum bits.

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Series: Applied physics letters
ISSN: 0003-6951
ISSN-E: 0003-6951
ISSN-L: 0003-6951
Volume: 115
Issue: 8
Article number: 082601
DOI: 10.1063/1.5116659
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
Funding: This project received funding from the European Union's Horizon 2020 Research and Innovation Programme under Marie Skłodowska-Curie Grant No. 795159 and under European Research Council Consolidator Grant No. 681311 (QUESS); from the Academy of Finland Centre of Excellence in Quantum Technology Grant Nos. 312300, 316619, and 305237; from JST ERATO Grant No. JPMJER1601; from JSPS KAKENHI Grant No. 18K03486; from the EU Flagship project QMiCS; from the Emil Aaltonen Foundation; from the Alfred Kordelin Foundation; and from the Vilho, Yrjö and Kalle Väisälä Foundation. We acknowledge the provision of facilities and technical support of Aalto University at OtaNano—Micronova Nanofabrication Center.
Academy of Finland Grant Number: 316619
Detailed Information: 316619 (Academy of Finland Funding decision)
Copyright information: © 2019 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license ( .