Observation of Vanishing Charge Dispersion of a Nearly Open Superconducting Island
| Autor: | Arno Bargerbos, Gijs De Lange, Willemijn Uilhoorn, Bernard Van Heck, Angela Kou, Leo P. Kouwenhoven, Chung Kai Yang, Peter Krogstrup |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Superconductivity
Physics Quantum Physics Scaling law Condensed Matter - Mesoscale and Nanoscale Physics hybrid Condensed matter physics transmon Nanowire FOS: Physical sciences General Physics and Astronomy Transmon Dispersion Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences Quantum dot Qubit Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Coulomb Quantum Physics (quant-ph) 010306 general physics Coherence (physics) |
| Zdroj: | Bargerbos, A, Uilhoorn, W, Yang, C-K, Krogstrup, P, Kouwenhoven, L P, de lange, G, van Heck, B & Kou, A 2020, ' Observation of Vanishing Charge Dispersion of a Nearly Open Superconducting Island ', Physical Review Letters, vol. 124, no. 24, 246802 . https://doi.org/10.1103/PhysRevLett.124.246802 Physical Review Letters, 124(24) |
| ISSN: | 0031-9007 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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