Optical pulse design method for high-fidelity manipulation over ensemble qubits
US12387124B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2021 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | Jan 29, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/11
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention discloses an optical pulse design method for high-fidelity manipulation over ensemble qubits, so that fast and efficient two-color optical pulses that have high robustness against frequency detuning and a laser intensity fluctuation are constructed by using an inverse engineering method based on a Lewis-Riesenfeld invariant, and using a perturbation theory and a concept of a system error sensitivity. The pulses can be applied in an inhomogeneously broadened three-level system to create an arbitrary superposition state of ensemble qubits with a high fidelity. During action of the pulse, quantum manipulation has stronger robustness against instantaneous changes or spatial nonuniform distribution of a laser intensity. The robustness can increase a signal-to-noise ratio of a detected signal and reduce experimental difficulties. In addition, the time that the qubits are in an excited state is significantly reduced, which can greatly reduce a decoherence effect of the qubits and ensure high-fidelity manipulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.