Virtual distillation for quantum error mitigation
US12282827B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 11, 2021 |
| Grant date | Apr 22, 2025 |
| Priority date | — |
| Expiry date | Dec 29, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06N10/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods, systems and apparatus for determining an error-mitigated expectation value of a target observable with respect to a noisy quantum state. In one aspect a method includes obtaining multiple copies of the noisy quantum state; performing measurements on tensor products of M copies of the noisy quantum state to compute an expectation value of the target observable with respect to an entangled quantum state, wherein M?1 and eigenvalues corresponding to non-dominant eigenvectors of the noisy quantum state in the spectral decomposition of the entangled quantum state are suppressed exponentially in M; and using the computed expectation value of the target observable with respect to an entangled quantum state to determine the error-mitigated expectation value of the target observable with respect to the noisy quantum state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.