Andreev Modes from Phase Winding in a Full-Shell Nanowire-Based Transmon

A. Kringhoj*, G. W. Winkler, T. W. Larsen, D. Sabonis, O. Erlandsson, P. Krogstrup, B. van Heck, K. D. Petersson, C. M. Marcus

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskriftLetterForskningpeer review

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Abstract

We investigate transmon qubits made from semiconductor nanowires with a fully surrounding superconducting shell. In the regime of reentrant superconductivity associated with the destructive Little-Parks effect, numerous coherent transitions are observed in the first reentrant lobe, where the shell carries 2 pi winding of superconducting phase, and are absent in the zeroth lobe. As junction density was increased by gate voltage, qubit coherence was suppressed then lost in the first lobe. These observations and numerical simulations highlight the role of winding-induced Andreev states in the junction.

OriginalsprogEngelsk
Artikelnummer047701
TidsskriftPhysical Review Letters
Vol/bind126
Udgave nummer4
Antal sider6
ISSN0031-9007
DOI
StatusUdgivet - 29 jan. 2021

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