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arXiv · 1503.08483

Realization of microwave quantum circuits using hybrid superconducting-semiconducting nanowire Josephson elements

G. de Lange·B. van Heck·A. Bruno·D. J. van Woerkom·A. Geresdi·S. R. Plissard·E. P. A. M. Bakkers·A. R. Akhmerov·L. DiCarlo
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Abstract

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 qubits with electrically tunable transition frequencies. Two-element circuits also exhibit transmon-like behavior near zero applied flux, but behave as flux qubits at half the flux quantum, where non-sinusoidal 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 magnetic field.

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G. de Lange, B. van Heck, A. Bruno, D. J. van Woerkom, A. Geresdi, S. R. Plissard, E. P. A. M. Bakkers, A. R. Akhmerov, L. DiCarlo. 2015-03-29. Realization of microwave quantum circuits using hybrid superconducting-semiconducting nanowire Josephson elements. https://doi.org/10.1103/physrevlett.115.127002

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