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) |
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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