Tunable interactions for implementing two-qubit gates, and extensible circuits built therefrom
US12333386B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 21, 2022 |
| Grant date | Jun 17, 2025 |
| Priority date | — |
| Expiry date | Oct 21, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N60/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method provide two-qubit gates and quantum computing circuits built therefrom. Pairs of qubits are inductively or capacitively coupled using a coupler that is driven using an off-resonant microwave drive. By controlling the drive, the ZZ interaction between the qubits can be precisely controlled. In particular, the interaction may be selectively reduced or suppressed, thereby isolating the qubits from each other, or the interaction may be increased to provide fast, controlled-Z, two-qubit gates with high fidelity. Moreover, qubits and couplers may be arranged according to their resonant frequencies into unit cells and replicated to arbitrary size, thereby forming a quantum computer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.