Generator for producing photon number state
US7049574B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 1999 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Nov 10, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0852
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus for generating a specified number of photons whose generating time is known, and further an apparatus for generating a specified number of photons in the known schedule are provided. The particularly important specified number is 1 and it is able to be applied to quantum cryptographic communication. The apparatus comprises a photon pair source for generating a photon pair that comprises a signal photon and an idler photon and correlates with the generating time, photon number detectors for detecting the photon number of idler photons, a controller for controlling the gate device in conformity with the information on the photon number form the photon number detector, and a gate device for controlling the emission of the signal photon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.