Detection of leakage of a qubit without directly measuring the qubit
US11221364B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 2020 |
| Grant date | Jan 11, 2022 |
| Priority date | — |
| Expiry date | Aug 28, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06N10/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of detecting leakage of a data qubit includes applying a first cross-resonance pulse to the data qubit, the data qubit including a first state and a second state; applying a first echo pulse to the data qubit temporally following the applied first cross-resonance pulse; applying a second cross-resonance pulse to the data qubit temporally following the applied first echo pulse, the second cross-resonance pulse being an inverted form of the first cross-resonance pulse; applying a second echo pulse to the data qubit temporally following the second cross-resonance pulse; and detecting a leakage associated with the data qubit using an ancilla qubit coupled to the data qubit based on application of the first and second cross-resonance pulses, and the first and second echo pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.