Superconducting quantum-bit device based on Josephson junctions
US6838694B2 · kind B2 · utility
122Cited by
1References
15Claims
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Inventors
Key dates
| Filing date | Sep 16, 2002 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Sep 16, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/933
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A superconducting quantum-bit device based on Josephson junction has a charge as a first principal degree of freedom assigned to writing and a phase as a second principal degree of freedom assigned to reading. The device comprises a Cooper-pair box comprising first and second Josephson junctions defining a charge island of the Cooper-pair box closing up onto a superconducting loop. A read circuit comprises a read Josephson junction JL inserted into the superconducting loop and having a Josephson energy Ej at least 50 times greater than the Josephson energy of each of the first and second Josephson junctions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.