Observation of Vanishing Charge Dispersion of a Nearly Open Superconducting Island.

Bargerbos, Arno; Uilhoorn, Willemijn; Yang, Chung-Kai; Krogstrup, Peter; Kouwenhoven, Leo P; de Lange, Gijs; van Heck, Bernard; Kou, Angela

Bargerbos, Arno; Uilhoorn, Willemijn; Yang, Chung-Kai; Krogstrup, Peter; Kouwenhoven, Leo P; de Lange, Gijs; van Heck, Bernard; Kou, Angela.

Afiliación

Bargerbos A; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands.
Uilhoorn W; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands.
Yang CK; Microsoft Quantum Lab Delft, 2600 GA Delft, The Netherlands.
Krogstrup P; Microsoft Quantum Materials Lab and Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Kanalvej 7, 2800 Kongens Lyngby, Denmark.
Kouwenhoven LP; QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands.
de Lange G; Microsoft Quantum Lab Delft, 2600 GA Delft, The Netherlands.
van Heck B; Microsoft Quantum Lab Delft, 2600 GA Delft, The Netherlands.
Kou A; Microsoft Quantum Lab Delft, 2600 GA Delft, The Netherlands.

Phys Rev Lett ; 124(24): 246802, 2020 Jun 19.

Article en En | MEDLINE | ID: mdl-32639813

RESUMEN

Isolation from the environment determines the extent to which charge is confined on an island, which manifests as Coulomb oscillations, such as charge dispersion. We investigate the charge dispersion of a nanowire transmon hosting a quantum dot in the junction. We observe rapid suppression of the charge dispersion with increasing junction transparency, consistent with the predicted scaling law, which incorporates two branches of the Josephson potential. We find improved qubit coherence times at the point of highest suppression, suggesting novel approaches for building charge-insensitive qubits.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2020 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Estados Unidos

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