Multi-qubit entangling gate using a frequency-modulated tunable coupler
US11210600B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2018 |
| Grant date | Dec 28, 2021 |
| Priority date | — |
| Expiry date | Oct 29, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N69/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A quantum processing comprises n fixed-frequency quantum circuits of distinct frequencies, where n≥3. The device further comprises a frequency-tunable coupler, designed in such a manner that its frequency can be concomitantly modulated at m frequencies, where m≥2, and wherein said m frequencies correspond, each, to a difference of energy between a respective pair of quantum states spanned by the quantum circuits. The quantum circuits are, each, coupled to the tunable coupler. The method may rely on modulating the frequency of the tunable coupler concomitantly at said m frequencies. This, for example, is done so as to drive m energy transitions between connected pairs of states spanned by the quantum circuits and achieve an entangled state of the quantum circuits as a superposition of l states spanned by the quantum circuits, l≥m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.