High coherence, small footprint superconducting qubit made by stacking up atomically thin crystals
US11342493B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2020 |
| Grant date | May 24, 2022 |
| Priority date | — |
| Expiry date | Jan 2, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N60/805
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A superconducting qubit is manufactured by stacking up atomically-thin, crystalline monolayers to form a heterostructure held together by van der Waals forces. Two sheets of superconducting material are separated by a third, thin sheet of dielectric to provide both a parallel plate shunting capacitor and a Josephson tunneling barrier. The superconducting material may be a transition metal dichalcogenide (TMD), such as niobium disilicate, and the dielectric may be hexagonal boron nitride. The qubit is etched, or material otherwise removed, to form a magnetic flux loop for tuning. The heterostructure may be protected by adhering additional layers of the dielectric or other insulator on its top and bottom. For readout, the qubit may be coupled to an external resonator, or the resonator may be integral with one of the sheets of superconducting material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.