Journal article
Rabi oscillations in a superconducting nanowire circuit
Y Schön, JN Voss, M Wildermuth, A Schneider, ST Skacel, MP Weides, JH Cole, H Rotzinger, AV Ustinov
Npj Quantum Materials | NATURE PUBLISHING GROUP | Published : 2020
Open access
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.
Grants
Awarded by Helmholtz Association
Funding Acknowledgements
The authors want to thank J. Lisenfeld and I. Pop for fruitful discussions as well as L. Radtke and S. Diewald for assistance in sample fabrication and R. Gebauer for contributions to the measurement setup. 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 Landesgraduiertenforderung of the federal state Baden-Wurttemberg (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.