Abstract
We discuss a new method for realizing number-resolving and non-demolition photo detectors by strong coupling of light to individual single photon emitters, which act as strong optical non-linearities. As a specific application we show how these elements can be integrated into an error-proof Bell state analyzer, whose efficiency exceeds the best possible performance with linear optics even for a modest atom-field coupling. The methods are error-proof in the sense that every detection event unambiguously projects the photon state onto a Fock or Bell state and imperfections only result in reduced success probability, not in wrong results.
| Original language | English |
|---|---|
| Journal | EPL |
| Volume | 97 |
| Issue number | 5 |
| Pages (from-to) | 50007 |
| Number of pages | 7 |
| ISSN | 0295-5075 |
| DOIs | |
| Publication status | Published - 6 Mar 2012 |