Abstract
We present various experiments demonstrating the mutual exclusivity of observing interference and which-path information, as demanded by Bohr's complementarity principle. Using photon pairs created in parametric down-conversion, no which-path measurements need to be performed on the interfering photon itself. Instead the other photon can be used to introduce distinguishability, which consequently destroys interference. However, a suitable measurement erases this distinguishability and interference can be recovered.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 3034-3037 |
| Number of pages | 4 |
| Journal | Physical review letters |
| Volume | 75 |
| Issue number | 17 |
| DOIs | |
| State | Published - 1995 |
| Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy