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Josephson phase qubit circuit for the evaluation of advanced tunnel barrier materials

Published

Author(s)

Jeffrey S. Kline, Haohua Wang, Seongshik Oh, John M. Martinis, David P. Pappas

Abstract

We have found that crystalline Josephson junctions have critical current density control problems which decrease circuit yield. We present a qubit circuit designed to accommodate a factor-of-five variation in critical current density for the evaluation of advanced tunnel barrier materials for Josephson phase qubits. Using this circuit design, we compare the performance of qubits fabricated with MgO and Al2O3 advanced crystalline tunnel barriers to AlOx amorphous tunnel barrier qubits.
Citation
Superconductor Science & Technology
Volume
22

Citation

Kline, J. , Wang, H. , Oh, S. , Martinis, J. and Pappas, D. (2008), Josephson phase qubit circuit for the evaluation of advanced tunnel barrier materials, Superconductor Science & Technology, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=33165 (Accessed April 18, 2024)
Created November 21, 2008, Updated February 19, 2017