The Meaning of the Interaction-Free Measurements
Abstract
Description
Interaction-free measurements introduced by Elitzur and Vaidman [Found. Phys. 23, 987 (1993)] allow finding infinitely fragile objects without destroying them. Many experiments have been successfully performed showing that indeed, the original scheme and its modifications lead to reduction of the disturbance of the observed systems. However, there is a controversy about the validity of the term ``interaction-free'' for these experiments. Broad variety of such experiments are reviewed and the meaning of the interaction-free measurements is clarified.
10 pages. There is some overlap with quant-ph/0006077 and quant-ph/0102049 which are contributions to conferences where some of the results were presented
10 pages. There is some overlap with quant-ph/0006077 and quant-ph/0102049 which are contributions to conferences where some of the results were presented