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Frequency-Tunable Josephson Junction Resonator for Quantum Computing

Published

Author(s)

Kevin Osborn, Joshua Strong, Adam J. Sirois, Raymond W. Simmonds

Abstract

We have fabricated and measured a high-Q Josephson junction resonator with a tunable resonance frequency. A dc magnetic flux allows the resonance frequency to be changed by over 10%. Weak coupling to the environment allows a quality factor of 7000 in the nonlinear resonator when less than one photon on average is stored in the resonator. At large photon numbers, the nonlinearity of the Josephson junction creates two stable oscillation states. This resonator can be used as a tool for investigating the quality of the Josephson junctions below the single photon limit, and can be used as a microwave qubit readout at higher energies.
Citation
IEEE Transactions on Applied Superconductivity
Volume
17
Issue
2

Keywords

Quantum Computing

Citation

Osborn, K. , Strong, J. , Sirois, A. and Simmonds, R. (2007), Frequency-Tunable Josephson Junction Resonator for Quantum Computing, IEEE Transactions on Applied Superconductivity, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32565 (Accessed February 29, 2024)
Created June 23, 2007, Updated January 27, 2020