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

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Author(s): Jeffrey S. Kline; Haohua Wang; Seongshik Oh; John M. Martinis; David P. Pappas;
Title: Josephson phase qubit circuit for the evaluation of advanced tunnel barrier materials
Published: November 21, 2008
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
Pages: pp. 1 - 5
Research Areas: Magnetic materials, Condensed Matter Physics, Superconductivity, Quantum Computing/Quantum Computation, Physics
PDF version: PDF Document Click here to retrieve PDF version of paper (498KB)