Details

Autor(en) / Beteiligte

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

Titel

Observation of Vanishing Charge Dispersion of a Nearly Open Superconducting Island

Ist Teil von

• Physical review letters, 2020-06, Vol.124 (24), p.1-246802, Article 246802

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• 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.