Quantitative wave-particle duality in multibeam interferometers - art. no.042113

We propose quantitative measures of wave properties and particle properties for multibeam interferometers. We show that these quantities are connected by a few fundamental inequalities which express wave-particle duality. Our analysis includes which-way detection schemes and quantum erasure. The ine qualities derived here are a generalization of similar limits which were st udied previously in the special case of two-beam interferometers. In additi on, we propose alternative measures that express the available information more efficiently, and we show that these measures fulfill similar inequalit ies.