There has been significant interest and efforts to develop single-photon sources driven by applications such as quantum information, quantum communication, and quantum metrology. One thing clear from the earliest efforts to develop such sources, was that individual single-photon sources as implemented fall far short of the ideal. Performance deficiencies range from the most basic, such as not producing a photon when called for and the production of more than one photon when only one is desired, to more subtle effects like having subsequent photon emissions, which should be identical, be in fact, distinguishable. Such distinguishability can be a problem whether the emissions come from the same source or different sources.
展开▼
