Rabi oscillations in a superconducting nanowire circuit

Schön, Y., Voss, J. N., Wildermuth, M., Schneider, A., Skacel, S. T., Weides, M. P. , Cole, J. H., Rotzinger, H. and Ustinov, A. V. (2020) Rabi oscillations in a superconducting nanowire circuit. npj Quantum Materials, 5(1), 18. (doi: 10.1038/s41535-020-0220-x)

Abstract

We investigate the circuit quantum electrodynamics of anharmonic superconducting nanowire oscillators. The sample circuit consists of a capacitively shunted nanowire with a width of about 20 nm and a varying length up to 350 nm, capacitively coupled to an on-chip resonator. By applying microwave pulses we observe Rabi oscillations, measure coherence times and the anharmonicity of the circuit. Despite the very compact design, simple top-down fabrication and high degree of disorder in the oxidized (granular) aluminum material used, we observe lifetimes in the microsecond range.

• Item Type: Articles
• Additional Information: This work was supported by the Initiative and Networking Fund of the Helmholtz Association, as well as by the Helmholtz International Research School for Teratronics (to Y.S. and J.N.V.), the Landesgraduiertenförderung of the federal state Baden-Württemberg (to M.W.) and the Carl Zeiss Foundation (to A.S.). This work was partially supported by the Ministry of Education and Science of the Russian Federation in the framework of the Program to Increase Competitiveness of the NUST MISIS (contract No. K2-2017-081). J.H.C. acknowledges support of the Australian Research Council Centre of Excellence funding scheme (CE170100039) and the NCI National Facility through the National Computational Merit Allocation Scheme. M.P.W. acknowledges support of the European Research Council (ERC) under the Grant Agreement 648011. We acknowledge support by the KIT-Publication Fund of the Karlsruhe Institute of Technology.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Weides, Professor Martin
• Authors: Schön, Y., Voss, J. N., Wildermuth, M., Schneider, A., Skacel, S. T., Weides, M. P., Cole, J. H., Rotzinger, H., and Ustinov, A. V.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: npj Quantum Materials
• Publisher: Nature Publishing Group
• ISSN: 2397-4648
• Copyright Holders: Copyright © 2020 The Authors
• First Published: First published in npj Quantum Materials 5(1):18
• Publisher Policy: Reproduced under a Creative Commons licence