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Realization of Microwave Quantum Circuits Using Hybrid Superconducting-Semiconducting Nanowire Josephson Elements

2015; American Physical Society; Volume: 115; Issue: 12 Linguagem: Inglês

10.1103/physrevlett.115.127002

1092-0145

G. de Lange, B. van Heck, Alessandro Bruno, David J. van Woerkom, Attila Geresdi, Sébastien Plissard, Erik P. A. M. Bakkers, Anton Akhmerov, L. DiCarlo,

Physics of Superconductivity and Magnetism

We report the realization of quantum microwave circuits using hybrid superconductor-semiconductor Josephson elements comprised of InAs nanowires contacted by NbTiN. Capacitively shunted single elements behave as transmon circuits with electrically tunable transition frequencies. Two-element circuits also exhibit transmonlike behavior near zero applied flux but behave as flux qubits at half the flux quantum, where nonsinusoidal current-phase relations in the elements produce a double-well Josephson potential. These hybrid Josephson elements are promising for applications requiring microwave superconducting circuits operating in a magnetic field.