Compensating for entanglement loss in communication lines
US10693565B2 · kind B2 · utility
2Cited by
13References
20Claims
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Key dates
| Filing date | Sep 16, 2019 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Sep 16, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y20/00
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
Methods and apparatuses are provided that compensate for the polarization dependent loss (PDL) of fiber-optic quantum channels. Compensation is accomplished by inserting a compensating PDL into another quantum channel carrying entangled photons that are entangled with photons in the first channel having losses that are to be compensated for. By selecting the optimum magnitude and orientation for the compensating PDL, compensation for the PDL in the first channel is maximized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.